Climate and monthly weather forecastSaint John Harbor, AK
Climate and monthly weather forecast
Weather in January
January, the same as December, is a wintry winter month in Saint John Harbor, Alaska, with an average temperature varying between 27.3°F (-2.6°C) and 32.7°F (0.4°C). In January, Saint John Harbor's weather conditions record an average high-temperature of a still cold 32.7°F (0.4°C), demonstrating little divergence from the preceding month. Weather in January »Weather in February
The last month of the winter, February, is also a wintry month in Saint John Harbor, Alaska, with an average temperature varying between 32.9°F (0.5°C) and 25.9°F (-3.4°C). Saint John Harbor marks the arrival of February with an average high-temperature of a still wintry 32.9°F (0.5°C), hardly different from January's 32.7°F (0.4°C). Weather in February »Weather in March
The first month of the spring, March, is still a cold month in Saint John Harbor, Alaska, with temperature in the range of an average low of 27.9°F (-2.3°C) and an average high of 36.9°F (2.7°C). With the transition into March, Saint John Harbor notes an average high-temperature of a still icy 36.9°F (2.7°C), closely resembling February. Weather in March »Weather in April
April in Saint John Harbor, Alaska, is a chilly spring month, with an average temperature varying between 43.3°F (6.3°C) and 34.3°F (1.3°C). Saint John Harbor's transition into April brings a slight rise in the average high-temperature, moving from an icy 36.9°F (2.7°C) in March to a frosty 43.3°F (6.3°C). Weather in April »Weather in May
May, the last month of the spring in Saint John Harbor, is a fresh month, with an average temperature varying between 51.6°F (10.9°C) and 41.9°F (5.5°C). May witnesses a subtle temperature ascent, adjusting from a frosty 43.3°F (6.3°C) in April to a fresh 51.6°F (10.9°C). Weather in May »Weather in June
June, the first month of the summer in Saint John Harbor, is a mild month, with temperature in the range of an average high of 55.4°F (13°C) and an average low of 46.2°F (7.9°C). Entering June, the average high-temperature is recorded at a moderate 55.4°F (13°C), exhibiting a minimal shift from May's 51.6°F (10.9°C). Weather in June »Weather in July
July, the same as June, in Saint John Harbor, Alaska, is a moderate summer month, with an average temperature varying between 50.2°F (10.1°C) and 59.7°F (15.4°C). July brings the highest temperatures, with an average high of 59.7°F (15.4°C) and an average low of 50.2°F (10.1°C). Weather in July »Weather in August
The last month of the summer, August, is another refreshing month in Saint John Harbor, Alaska, with an average temperature fluctuating between 50°F (10°C) and 59°F (15°C). Saint John Harbor notes an average high-temperature of a still refreshing 59°F (15°C) in August, hardly diverging from July. Weather in August »Weather in September
September, the first month of the autumn in Saint John Harbor, is also a fresh month, with an average temperature varying between 54.3°F (12.4°C) and 46.4°F (8°C). Saint John Harbor experiences an average high-temperature of a cool 54.3°F (12.4°C) in September, marking an insignificant shift from 59°F (15°C) in August. Weather in September »Weather in October
October, like September, is a frosty autumn month in Saint John Harbor, Alaska, with an average temperature varying between 46°F (7.8°C) and 39.7°F (4.3°C). The onset of October results in a small decrease in the average high-temperature, moderately receding from a cool 54.3°F (12.4°C) in September to a frosty 46°F (7.8°C). Weather in October »Weather in November
The last month of the autumn, November, is another cold month in Saint John Harbor, Alaska, with an average temperature fluctuating between 37°F (2.8°C) and 32.4°F (0.2°C). Saint John Harbor in November undergoes a mild reduction in the average high-temperature, shifting from October's frosty 46°F (7.8°C) to a cold 37°F (2.8°C). Weather in November »Weather in December
The first month of the winter, December, is also an icy month in Saint John Harbor, Alaska, with an average temperature fluctuating between 32.4°F (0.2°C) and 27.5°F (-2.5°C). With average temperatures fluctuating between a high of 32.4°F (0.2°C) and a low of 27.5°F (-2.5°C), December stands out as the coldest month. Weather in December »Updated: Jun 3, 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
January and August, with an average relative humidity of 86%, are most humid months in Saint John Harbor.
Throughout the year, there are 197.9 rainfall days, and 53.03" (1347mm) of precipitation is accumulated.
Months with snowfall are January through May, October through December.
In Saint John Harbor, Alaska, during the entire year, snow falls for 47.5 days and aggregates up to 58.23" (1479mm) of snow.
January and November, with an average of 3.4h of sunshine, are months with the least sunshine.
March is the month with the most snowfall. Snow falls for 10.8 days and accumulates 13.46" (342mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from AKST to AKDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from AKDT to AKST.
With an average relative humidity of 81%, May is the least humid month.
May is the month with the least rainfall. Rain falls for 17.1 days and accumulates 2.01" (51mm) of precipitation.
The month with the most sunshine is May, with an average of 7.4h of sunshine.
June through September are months without snowfall.
June has the longest days of the year, with an average of 17h and 36min of daylight.
The warmest time of the year in Saint John Harbor is July, with temperatures averaging a high of 59.7°F (15.4°C) and a low of 50.2°F (10.1°C).
July and August, with an average maximum UV index of 4, are months with the highest UV index.
October is the month with the most rainfall. Rain falls for 20.1 days and accumulates 6.3" (160mm) of precipitation.
The months with the lowest UV index are November and December, with an average maximum UV index of 1.
The coldest period is December, when temperatures fluctuate between an average high of 32.4°F (0.2°C) and a low of 27.5°F (-2.5°C).
With an average of 7h and 0min of daylight, December has the shortest days of the year.
Average temperature
Saint John Harbor, AK
The warmest month (with the highest average high temperature) is July (59.7°F).
The month with the lowest average high temperature is December (32.4°F).
The month with the highest average low temperature is July (50.2°F).
The coldest month (with the lowest average low temperature) is February (25.9°F).
Average pressure
Saint John Harbor, AK
- Average pressure in January:
29.85"Hg - Average pressure in February:
29.95"Hg - Average pressure in March:
29.85"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
30"Hg - Average pressure in June:
29.98"Hg
- Average pressure in July:
30.05"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
29.91"Hg - Average pressure in October:
29.87"Hg - Average pressure in November:
29.8"Hg - Average pressure in December:
29.88"Hg
The month with the highest atmospheric pressure is July (30.05"Hg).
The month with the lowest atmospheric pressure is November (29.8"Hg).
Average wind speed
Saint John Harbor, AK
- Average wind speed in January:
8.2mph - Average wind speed in February:
7.2mph - Average wind speed in March:
6.7mph - Average wind speed in April:
5.7mph - Average wind speed in May:
4.6mph - Average wind speed in June:
4.1mph
- Average wind speed in July:
3.9mph - Average wind speed in August:
4.3mph - Average wind speed in September:
5.7mph - Average wind speed in October:
6.7mph - Average wind speed in November:
7.7mph - Average wind speed in December:
7.7mph
The windiest month (with the highest average wind speed) is January (8.2mph).
The calmest month (with the lowest average wind speed) is July (3.9mph).
Average humidity
Saint John Harbor, AK
The months with the highest relative humidity are January and August (86%).
The month with the lowest relative humidity is May (81%).
Average rainfall
Saint John Harbor, AK
- Average rainfall in January:
6.02" - Average rainfall in February:
3.74" - Average rainfall in March:
3.58" - Average rainfall in April:
3.54" - Average rainfall in May:
2.01" - Average rainfall in June:
3.19"
The wettest month (with the highest rainfall) is October (6.3").
The driest month (with the least rainfall) is May (2.01").
Average rainfall days
Saint John Harbor, AK
- Average rainfall days in January:
15.8 days - Average rainfall days in February:
9.5 days - Average rainfall days in March:
12.9 days - Average rainfall days in April:
18.1 days - Average rainfall days in May:
17.1 days - Average rainfall days in June:
19.3 days
- Average rainfall days in July:
17 days - Average rainfall days in August:
17.7 days - Average rainfall days in September:
17.5 days - Average rainfall days in October:
20.1 days - Average rainfall days in November:
18.3 days - Average rainfall days in December:
14.6 days
The month with the highest number of rainy days is October (20.1 days).
The month with the least rainy days is February (9.5 days).
Average snowfall
Saint John Harbor, AK
- Average snowfall in January:
11.73" - Average snowfall in February:
12.95" - Average snowfall in March:
13.46" - Average snowfall in April:
2.6" - Average snowfall in May:
0.12" - Average snowfall in June:
0"
The month with the highest snowfall is March (13.46").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Saint John Harbor, AK
- Average snowfall days in January:
8.6 days - Average snowfall days in February:
9.1 days - Average snowfall days in March:
10.8 days - Average snowfall days in April:
3.8 days - Average snowfall days in May:
0.2 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:
0.2 days - Average snowfall days in November:
6.4 days - Average snowfall days in December:
8.4 days
The month with the highest number of snowfall days is March (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Saint John Harbor, AK
- Average daylight in January:
7h and 42min - Average daylight in February:
9h and 36min - Average daylight in March:
11h and 54min - Average daylight in April:
14h and 18min - Average daylight in May:
16h and 30min - Average daylight in June:
17h and 36min
- Average daylight in July:
17h and 0min - Average daylight in August:
15h and 6min - Average daylight in September:
12h and 42min - Average daylight in October:
10h and 24min - Average daylight in November:
8h and 12min - Average daylight in December:
7h and 0min
The month with the longest days is June (Average daylight: 17h and 36min).
The month with the shortest days is December (Average daylight: 7h and 0min).
- Average sunshine in January:
3h and 24min - Average sunshine in February:
4h and 12min - Average sunshine in March:
5h and 12min - Average sunshine in April:
6h and 42min - Average sunshine in May:
7h and 24min - Average sunshine in June:
7h and 6min
- Average sunshine in July:
6h and 48min - Average sunshine in August:
6h and 54min - Average sunshine in September:
6h and 42min - Average sunshine in October:
4h and 12min - Average sunshine in November:
3h and 24min - Average sunshine in December:
3h and 48min
The month with the most sunshine is May (Average sunshine: 7h and 24min).
The months with the least sunshine are January and November (Average sunshine: 3h and 24min).
Average sunshine days
Saint John Harbor, AK
- Average sunshine days in January:
10.5 days - Average sunshine days in February:
12.3 days - Average sunshine days in March:
11.7 days - Average sunshine days in April:
9.1 days - Average sunshine days in May:
11.3 days - Average sunshine days in June:
9 days
- Average sunshine days in July:
11.8 days - Average sunshine days in August:
12.3 days - Average sunshine days in September:
11.5 days - Average sunshine days in October:
10.1 days - Average sunshine days in November:
8 days - Average sunshine days in December:
12.5 days
The month with the most sunshine days is December (12.5 days).
The month with the least sunshine days is November (8 days).
Average UV index
Saint John Harbor, AK
The months with the highest UV index are July and August (UV index 4).
The months with the lowest UV index are November and December (UV index 1).
Average cloud cover
Saint John Harbor, AK
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are February and May (Cloud cover 54).
Average visibility
Saint John Harbor, AK
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
