Climate and monthly weather forecastPort Saint John, FL
Climate and monthly weather forecast
Weather in January
January, like December, is an agreeable winter month in Port Saint John, Florida, with temperature in the range of an average low of 56.1°F (13.4°C) and an average high of 68.4°F (20.2°C). The month of January sees the lowest average temperatures, reaching 68.4°F (20.2°C) at the peak and 56.1°F (13.4°C) at the low. Weather in January »Weather in February
February, the last month of the winter in Port Saint John, is another pleasant month, with an average temperature ranging between min 59°F (15°C) and max 71.2°F (21.8°C). Port Saint John notes an average high-temperature of a still pleasant 71.2°F (21.8°C) in February, hardly diverging from January. Weather in February »Weather in March
The first month of the spring, March, is a moderately hot month in Port Saint John, Florida, with an average temperature ranging between max 74.3°F (23.5°C) and min 61.5°F (16.4°C). Port Saint John's March average high-temperature settles at a moderately hot 74.3°F (23.5°C), showing a near match with the preceding month. Weather in March »Weather in April
April, like March, in Port Saint John, Florida, is another warm spring month, with an average temperature varying between 67.1°F (19.5°C) and 79.3°F (26.3°C). The arrival of April sees a recorded average high-temperature of a still warm 79.3°F (26.3°C), showing little divergence from the previous month's conditions. Weather in April »Weather in May
The last month of the spring, May, is another warm month in Port Saint John, Florida, with an average temperature fluctuating between 71.4°F (21.9°C) and 83.1°F (28.4°C). As April transitions into May, the average high-temperature rests at a still warm 83.1°F (28.4°C), maintaining a close resemblance to the previous month. Weather in May »Weather in June
The first month of the summer, June, is a tropical month in Port Saint John, Florida, with an average temperature varying between 75.7°F (24.3°C) and 87.1°F (30.6°C). June's arrival brings an average high-temperature of a tropical 87.1°F (30.6°C), slightly deviating from May's 83.1°F (28.4°C). Weather in June »Weather in July
July, like June, is a hot summer month in Port Saint John, Florida, with temperature in the range of an average high of 88.3°F (31.3°C) and an average low of 76.8°F (24.9°C). Upon the onset of July, Port Saint John witnesses an average high-temperature of a still hot 88.3°F (31.3°C), showing a close resemblance to the prior month. Weather in July »Weather in August
August, the last month of the summer in Port Saint John, is another hot month, with temperature in the range of an average high of 88.7°F (31.5°C) and an average low of 77.9°F (25.5°C). August, on average, is the warmest month, registering a high temperature of 88.7°F (31.5°C) and a low of 77.9°F (25.5°C). The heat index for August is estimated at a blistering 107.6°F (42°C). Weather in August »Weather in September
September, the first month of the autumn in Port Saint John, is still a tropical month, with an average temperature ranging between min 76.6°F (24.8°C) and max 86.4°F (30.2°C). Port Saint John, Florida, observes an average high-temperature of a still tropical 86.4°F (30.2°C) in September, barely different from 88.7°F (31.5°C) in August. Weather in September »Weather in October
October, the same as September, is a moderately hot autumn month in Port Saint John, Florida, with temperature in the range of an average low of 71.8°F (22.1°C) and an average high of 81.7°F (27.6°C). As Port Saint John welcomes October, the average high-temperature stabilizes at a moderately hot 81.7°F (27.6°C), showing little deviation from September's 86.4°F (30.2°C). Weather in October »Weather in November
The last month of the autumn, November, is another warm month in Port Saint John, Florida, with temperature in the range of an average low of 65.3°F (18.5°C) and an average high of 75.7°F (24.3°C). Port Saint John's progression into November involves a gentle drop in the average high-temperature, from a warm 81.7°F (27.6°C) in October to a still moderately hot 75.7°F (24.3°C). Weather in November »Weather in December
The first month of the winter, December, is still a pleasant month in Port Saint John, Florida, with temperature in the range of an average high of 72.3°F (22.4°C) and an average low of 60.8°F (16°C). The advent of December reveals an average high-temperature of a pleasant 72.3°F (22.4°C), showing minimal difference from the prior month. Weather in December »Updated: Jul 16, 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
Port Saint John records the coldest temperatures in January, averaging a high of 68.4°F (20.2°C) and a low of 56.1°F (13.4°C).
Throughout the year, there are 202 rainfall days, and 40.2" (1021mm) of precipitation is accumulated.
The months with the least sunshine are January, November and December, with an average of 6.1h of sunshine.
January is the month with the lowest UV index, with an average maximum UV index of 4.
March is the least humid month, with an average relative humidity of 71%.
March is the month with the least rainfall. Rain falls for 11 days and accumulates 1.42" (36mm) of precipitation.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
May through September, with an average maximum UV index of 7, are months with the highest UV index in Port Saint John.
June has the longest days of the year, with an average of 13h and 54min of daylight.
The month with the most sunshine is July, with an average of 11h of sunshine.
The warmest month is August, with an average high-temperature of 88.7°F (31.5°C) and an average low-temperature of 77.9°F (25.5°C).
The most humid month is August, with an average relative humidity of 79%.
The month with the most rainfall is August, when the rain falls for 25.8 days and typically aggregates up to 6.81" (173mm) of precipitation.
December has the shortest days of the year, with an average of 10h and 24min of daylight.
Average temperature
Port Saint John, FL
The warmest month (with the highest average high temperature) is August (88.7°F).
The month with the lowest average high temperature is January (68.4°F).
The month with the highest average low temperature is August (77.9°F).
The coldest month (with the lowest average low temperature) is January (56.1°F).
Average pressure
Port Saint John, FL
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
30.03"Hg - Average pressure in May:
30.02"Hg - Average pressure in June:
30"Hg
- Average pressure in July:
30.03"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
29.97"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).
Average wind speed
Port Saint John, FL
- Average wind speed in January:
8.8mph - Average wind speed in February:
8.3mph - Average wind speed in March:
8.5mph - Average wind speed in April:
8.4mph - Average wind speed in May:
7.7mph - Average wind speed in June:
6.5mph
- Average wind speed in July:
6mph - Average wind speed in August:
6.3mph - Average wind speed in September:
6.9mph - Average wind speed in October:
8.3mph - Average wind speed in November:
8.8mph - Average wind speed in December:
8.2mph
The windiest months (with the highest average wind speed) are January and November (8.8mph).
The calmest month (with the lowest average wind speed) is July (6mph).
Average humidity
Port Saint John, FL
The month with the highest relative humidity is August (79%).
The month with the lowest relative humidity is March (71%).
Average rainfall
Port Saint John, FL
- Average rainfall in January:
1.54" - Average rainfall in February:
1.54" - Average rainfall in March:
1.42" - Average rainfall in April:
2.01" - Average rainfall in May:
3.9" - Average rainfall in June:
5.28"
The wettest month (with the highest rainfall) is August (6.81").
The driest month (with the least rainfall) is March (1.42").
Average rainfall days
Port Saint John, FL
- Average rainfall days in January:
11.8 days - Average rainfall days in February:
10.8 days - Average rainfall days in March:
11 days - Average rainfall days in April:
13.8 days - Average rainfall days in May:
15.6 days - Average rainfall days in June:
22.8 days
- Average rainfall days in July:
25.8 days - Average rainfall days in August:
25.8 days - Average rainfall days in September:
23.8 days - Average rainfall days in October:
15.7 days - Average rainfall days in November:
13 days - Average rainfall days in December:
12.1 days
The months with the highest number of rainy days are July and August (25.8 days).
The month with the least rainy days is February (10.8 days).
Average daylight / Average sunshine
Port Saint John, FL
- Average daylight in January:
10h and 36min - Average daylight in February:
11h and 12min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 54min - Average daylight in May:
13h and 36min - Average daylight in June:
13h and 54min
- Average daylight in July:
13h and 42min - Average daylight in August:
13h and 6min - Average daylight in September:
12h and 18min - Average daylight in October:
11h and 30min - Average daylight in November:
10h and 42min - Average daylight in December:
10h and 24min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).
- Average sunshine in January:
6h and 6min - Average sunshine in February:
7h and 54min - Average sunshine in March:
8h and 18min - Average sunshine in April:
9h and 48min - Average sunshine in May:
10h and 42min - Average sunshine in June:
10h and 36min
- Average sunshine in July:
11h and 0min - Average sunshine in August:
10h and 36min - Average sunshine in September:
8h and 54min - Average sunshine in October:
7h and 6min - Average sunshine in November:
6h and 6min - Average sunshine in December:
6h and 6min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The months with the least sunshine are January, November and December (Average sunshine: 6h and 6min).
Average sunshine days
Port Saint John, FL
- Average sunshine days in January:
17.2 days - Average sunshine days in February:
14.5 days - Average sunshine days in March:
17.2 days - Average sunshine days in April:
12.9 days - Average sunshine days in May:
13.4 days - Average sunshine days in June:
5 days
- Average sunshine days in July:
3.7 days - Average sunshine days in August:
2.3 days - Average sunshine days in September:
4.4 days - Average sunshine days in October:
12.5 days - Average sunshine days in November:
11.9 days - Average sunshine days in December:
15.2 days
The months with the most sunshine days are January and March (17.2 days).
The month with the least sunshine days is August (2.3 days).
Average UV index
Port Saint John, FL
The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 4).
Average cloud cover
Port Saint John, FL
The months with the most cloud cover are January, November and December (Cloud cover 35).
The month with the least cloud cover is May (Cloud cover 26).
Average visibility
Port Saint John, FL
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).
