Climate and monthly weather forecastDauphin Island, AL
Climate and monthly weather forecast
The climate of Dauphin Island
Dauphin Island, located in Alabama, USA, falls under the Köppen climate classification Cfa. This signifies a humid subtropical climatic condition with no specific dry season. The weather throughout the year in this region presents fluctuating scales of temperature and humidity. Notably, average monthly maximum temperatures move from 59°F (15°C) in January to a peak 88.7°F (31.5°C) in August and then descend back to 62.6°F (17°C) in December. Monthly low temperatures follow a similar pattern, with the lowest recorded in January at 47.3°F (8.5°C) and the highest in August at 78.8°F (26°C).Monitoring the relative humidity reveals an average yearly consistency, mostly ranging between 74% to 78%. Rainfall trends a touch higher from June to August, with the maximum 6.89" (175mm) noted in August. The measure of rainy days also tends to increase in these months, escalating from 11.1 days in January to a peak 25.3 days in July before receding to 13.1 days by December. Interestingly, snowfall is a rarity, with only an inconsequential 0.12" (3mm) recorded in January.
Sea temperatures around Dauphin Island fluctuate considerably between 58.7°F (14.8°C) in January to a warm 86.6°F (30.3°C) in August. These changes mirror the broader atmospheric conditions and can impact water activities. With average daily sunshine hours ranging from 5.5 hours in February to a high of 11.2 hours in June, and UV index fluctuating within 4 to 7 during the year, sufficient protective measures are advisable during outdoor activities. The wind speed maintains a moderate pace, ranging between 6.8mph (10.9km/h) to 9.5mph (15.3km/h).
The best time to visit Dauphin Island
Catering to the preference of visitors, the best time to relish Dauphin Island's scenic beauty can be from March to May or from September to November. During these periods, the temperatures are relatively benign, averaging high temperatures from 68.4°F (20.2°C) to 81.3°F (27.4°C) and from 85.5°F (29.7°C) to 68.2°F (20.1°C), respectively. Concurrently, the number of sunshine hours averages between 7.8 to 10.9 hours and 9.9 to 6.2 hours during these months, providing abundant daylight for outdoor activities.The worst time to visit Dauphin Island
Alternatively, considering the rise in rainfall amounts and days from June to August, tourists preferring less rainy weather might choose to avoid these months. High humidity and maximal temperatures hovering between 87.3°F (30.7°C) to 88.7°F (31.5°C) during this period, coupled with the highest sea temperatures of the year, might be uncomfortable for some visitors.Spring weather in Dauphin Island
From March to May, the island experiences spring's mildness coupled with temperatures progressively rising from a high of 68.4°F (20.2°C) to 81.3°F (27.4°C), and low temperatures moving upward from 56.8°F (13.8°C) to 70.3°F (21.3°C). During these months, rainfall varies between 2.68" (68mm) to 2.87" (73mm) and the number of rainy days veers from 13 days to 13.1 days. An alluring springtime feature is the increase in the duration of daily sunshine from 7.8 hours to 10.9 hours.Summer weather in Dauphin Island
The summer months at Dauphin Island, from June to August, witness a surge in temperatures, with highs peaking from 87.3°F (30.7°C) to 88.7°F (31.5°C) and lows fluctuating between 77°F (25°C) to 78.8°F (26°C). Rainfall rises noticeably during this period, reaching up to 6.89" (175mm) in August and the number of rainy days also increases to a highest of 25.3 days in July. The UV index climbs to its peak 7 around this season.Autumn weather in Dauphin Island
Autumn, from September to November, gradually lowers temperatures from a comforting 85.5°F (29.7°C) to a cooler 68.2°F (20.1°C). The lower temperatures dip between 75°F (23.9°C) to 55.4°F (13°C). Rainfall subsides significantly from 4.57" (116mm) to 2.28" (58mm) and the number of rainy days drops to 8.4 days by November. Autumn offers an impressive display of daily sunshine hours reducing from 9.9 to 6.2 hours.Winter weather in Dauphin Island
The winter months from December to February present a dip in temperatures with high temperatures lowering from 62.6°F (17°C) to 59°F (15°C) and low temperatures fluctuating between 51.4°F (10.8°C) to 47.3°F (8.5°C). Rainfall rises in December to 3.82" (97mm), subsiding again to 2.48" (63mm) by February. Daily sunshine hours reduce further to their lowest yearly levels, clocking between 5.5 to 5.8 hours. Despite the colder temps, the sea waters stay relatively warmer, hovering from 62.5°F (16.9°C) to 58.7°F (14.8°C).Weather in January
Dauphin Island, Alabama, starts the year mildly and damp. Cooler temperatures dominate with average highs peaking at 59°F (15°C) while lows can fall to 47.3°F (8.5°C). The month sees an appreciable amount of rain, including an average of 11.1 days of rainfall. Weather in January »Weather in February
The weather in February witnesses a slight elevation in temperatures compared to January. Despite the winter-season, the warmth of the Gulf of Mexico affects the city, allowing for a relatively mild month. Humidity remains fairly consistent, underlining the moist conditions in Dauphin Island. Weather in February »Weather in March
March ushers in the spring season in Dauphin Island and marks a considerable transition in weather. An average high temperature of 68.4°F (20.2°C) signifies the warmer trend. March's daylight extends to an average of 12 hours, symbolizing the changing of seasons. Weather in March »Weather in April
With April's arrival, the weather in Dauphin Island, Alabama leans towards warmer temperatures, signifying the full onset of the spring season. Rainfall levels remain quite steady, creating grounds for stimulating flora around the island. Weather in April »Weather in May
May hails the arrival of summer-like conditions in Dauphin Island. Understandably so, as temperatures start to surge, with the highest average temperature reaching up to 81.3°F (27.4°C). The long summer days ensure residents and vacationers get ample sunshine to enjoy the many outdoor activities the island offers. Weather in May »Weather in June
June in Dauphin Island brings peak summer conditions, characterized by hot temperatures and abundant rainfall. The average sea temperature hits an inviting 83.8°F (28.8°C), ideal for aquatic activities. The weather witnesses frequent rain showers, in fact, precipitation is maximum in June compared to any other month. Weather in June »Weather in July
July weather in Dauphin Island experiences sweltering heat with average maximum temperatures soaring to an annual peak of 88.3°F (31.3°C). Even though rainfall is significant during this month, long sunny days make outdoor excursions possible. Weather in July »Weather in August
August in Dauphin Island experiences a continuation of the sizzling July weather, with the hottest average minimum temperature of the year at 78.8°F (26°C). Skies remain dotted with clouds most of the time, designating a high level of humidity. Weather in August »Weather in September
With the arrival of September, Dauphin Island starts to see a dip in hot summer temperatures. While the weather continues to be wet, daylight begins to shorten and the extended sunlight of the summer months starts fading. The wind speed picks up a bit, hinting at the gradual change in the atmospheric flow patterns. Weather in September »Weather in October
October in Dauphin Island brings a pronounced shift in weather, as the cool autumn breeze starts to replace balmy summer days. The decline in rainfall and humidity makes it strikingly comfortable for outdoor activities. Average high temperatures begin to descend, reaching a modest 78.4°F (25.8°C). Weather in October »Weather in November
In November, Dauphin Island sees a definitive shift towards cooler temperatures. Weather patterns shift as autumn sets in, dressing the island in vibrant hues. The dropping temperatures signal the approaching winter. To add, the decrease in humidity offers a fresher and cleaner air, making outdoor activities more comfortable. Weather in November »Weather in December
Dauphin Island enters the winter season in December, and the weather adapts accordingly. Average high temperature decreases to 62.6°F (17°C), introducing the year's coldest month. Cloud cover is most prominent in December, suppressing the overall daylight hours to the minimum of the year. Weather in December »Updated: Jun 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Temperature readings reach their annual highs in January, averaging 59°F (15°C) and a minimum average of 47.3°F (8.5°C).
Throughout the year, there are 183.1 rainfall days, and 45.94" (1167mm) of precipitation is accumulated.
January is the only month when snow falls.
January is the month with the most snowfall. Snow falls for 0.1 days and accumulates 0.12" (3mm) of snow.
In Dauphin Island, Alabama, during the entire year, snow falls for 0.1 days and aggregates up to 0.12" (3mm) of snow.
January is the month with the coldest seawater, with an average ocean temperature of 58.6°F (14.8°C).
The months with the lowest UV index are January and December, with an average maximum UV index of 4.
February through December are months without snowfall.
February and December, with an average of 5.5h of sunshine, are months with the least sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
May through August, with an average maximum UV index of 7, are months with the highest UV index.
The month with the longest days is June, with an average of 14h and 6min of daylight.
June has the most sunshine of the year, with an average of 11.2h of sunshine.
Dauphin Island notes the warmest temperatures in August, with a average high of 88.7°F (31.5°C) and a low of 78.8°F (26°C).
August is the month with the most rainfall. Rain falls for 24.8 days and accumulates 6.89" (175mm) of precipitation.
With an average ocean temperature of 86.5°F (30.3°C), August is the month with the warmest seawater.
With an average relative humidity of 70%, October is the least humid month in Dauphin Island.
The month with the least rainfall is November, when the rain falls for 8.4 days and typically collects 2.28" (58mm) of precipitation.
December is the most humid month in Dauphin Island, with an average relative humidity of 78%.
The month with the shortest days is December, with an average of 10h and 12min of daylight.
Average temperature
Dauphin Island, AL
The warmest month (with the highest average high temperature) is August (88.7°F).
The month with the lowest average high temperature is January (59°F).
The month with the highest average low temperature is August (78.8°F).
The coldest month (with the lowest average low temperature) is January (47.3°F).
Average pressure
Dauphin Island, AL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
30.01"Hg - Average pressure in May:
30"Hg - Average pressure in June:
29.97"Hg
- Average pressure in July:
30"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
29.98"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.97"Hg).
Average wind speed
Dauphin Island, AL
- Average wind speed in January:
9.5mph - Average wind speed in February:
9.4mph - Average wind speed in March:
9.4mph - Average wind speed in April:
9.3mph - Average wind speed in May:
8.1mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.9mph - Average wind speed in September:
7.3mph - Average wind speed in October:
8.6mph - Average wind speed in November:
9.1mph - Average wind speed in December:
9.4mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity
Dauphin Island, AL
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Dauphin Island, AL
- Average rainfall in January:
2.64" - Average rainfall in February:
2.48" - Average rainfall in March:
2.68" - Average rainfall in April:
2.56" - Average rainfall in May:
2.87" - Average rainfall in June:
5.35"
- Average rainfall in July:
6.65" - Average rainfall in August:
6.89" - Average rainfall in September:
4.57" - Average rainfall in October:
3.15" - Average rainfall in November:
2.28" - Average rainfall in December:
3.82"
The wettest month (with the highest rainfall) is August (6.89").
The driest month (with the least rainfall) is November (2.28").
Average rainfall days
Dauphin Island, AL
- Average rainfall days in January:
11.1 days - Average rainfall days in February:
12.7 days - Average rainfall days in March:
13 days - Average rainfall days in April:
11.6 days - Average rainfall days in May:
13.1 days - Average rainfall days in June:
20.4 days
- Average rainfall days in July:
25.3 days - Average rainfall days in August:
24.8 days - Average rainfall days in September:
19.1 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
8.4 days - Average rainfall days in December:
13.1 days
The month with the highest number of rainy days is July (25.3 days).
The month with the least rainy days is November (8.4 days).
Average snowfall
Dauphin Island, AL
The month with the highest snowfall is January (0.12").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days
Dauphin Island, AL
- Average snowfall days in January:
0.1 days - Average snowfall days in February:
0 days - Average snowfall days in March:
0 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average sea temperature
Dauphin Island, AL
The best month for swimming (with the highest average sea temperature) is August (86.6°F).
The coldest month (with the lowest average sea temperature) is January (58.7°F).
Average daylight / Average sunshine
Dauphin Island, AL
- Average daylight in January:
10h and 30min - Average daylight in February:
11h and 6min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 54min - Average daylight in May:
13h and 42min - Average daylight in June:
14h and 6min
- Average daylight in July:
13h and 54min - Average daylight in August:
13h and 12min - Average daylight in September:
12h and 18min - Average daylight in October:
11h and 24min - Average daylight in November:
10h and 36min - Average daylight in December:
10h and 12min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in January:
5h and 48min - Average sunshine in February:
5h and 30min - Average sunshine in March:
7h and 48min - Average sunshine in April:
10h and 12min - Average sunshine in May:
10h and 54min - Average sunshine in June:
11h and 12min
- Average sunshine in July:
10h and 48min - Average sunshine in August:
10h and 48min - Average sunshine in September:
9h and 54min - Average sunshine in October:
8h and 6min - Average sunshine in November:
6h and 12min - Average sunshine in December:
5h and 30min
The month with the most sunshine is June (Average sunshine: 11h and 12min).
The months with the least sunshine are February and December (Average sunshine: 5h and 30min).
Average sunshine days
Dauphin Island, AL
- Average sunshine days in January:
17.9 days - Average sunshine days in February:
14.3 days - Average sunshine days in March:
16.5 days - Average sunshine days in April:
16.3 days - Average sunshine days in May:
14.9 days - Average sunshine days in June:
7 days
- Average sunshine days in July:
3.9 days - Average sunshine days in August:
4.2 days - Average sunshine days in September:
8.5 days - Average sunshine days in October:
18.8 days - Average sunshine days in November:
19.5 days - Average sunshine days in December:
15.5 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (3.9 days).
Average UV index
Dauphin Island, AL
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover
Dauphin Island, AL
The month with the most cloud cover is December (Cloud cover 42).
The month with the least cloud cover is October (Cloud cover 22).
Average visibility
Dauphin Island, AL
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
