Climate and monthly weather forecast
Port Saint John, FL

Weather in January

January, like December, is an agreeable winter month in Port Saint John, Florida, with an average temperature ranging between max 68.4°F (20.2°C) and min 56.1°F (13.4°C). January is the coldest month, with an average high-temperature of 68.4°F (20.2°C) and an average low-temperature of 56.1°F (13.4°C). Weather in January »

Weather in February

The last month of the winter, February, is another pleasant month in Port Saint John, Florida, with temperature in the range of an average high of 71.2°F (21.8°C) and an average low of 59°F (15°C). In Port Saint John, the average high-temperature in February is essentially the same as in January - a still agreeable 71.2°F (21.8°C). Weather in February »

Weather in March

The first month of the spring, March, is a warm month in Port Saint John, Florida, with an average temperature varying between 74.3°F (23.5°C) and 61.5°F (16.4°C). In Port Saint John, the average high-temperature in March is almost the same as in February - a moderately hot 74.3°F (23.5°C). Weather in March »

Weather in April

April, the same as March, is another warm spring month in Port Saint John, Florida, with temperature in the range of an average low of 67.1°F (19.5°C) and an average high of 79.3°F (26.3°C). In Port Saint John, the average high-temperature in April is essentially the same as in March - a still moderately hot 79.3°F (26.3°C). Weather in April »

Weather in May

The last month of the spring, May, is also a moderately hot month in Port Saint John, Florida, with an average temperature varying between 71.4°F (21.9°C) and 83.1°F (28.4°C). In May, the average high-temperature is practically the same as in April - a still moderately hot 83.1°F (28.4°C). 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 fluctuating between 87.1°F (30.6°C) and 75.7°F (24.3°C). In Port Saint John, the average high-temperature in June is practically the same as in May - a tropical 87.1°F (30.6°C). Weather in June »

Weather in July

July, like June, is a hot summer month in Port Saint John, Florida, with an average temperature fluctuating between 88.3°F (31.3°C) and 76.8°F (24.9°C). In July, the average high-temperature is practically the same as in June - a still hot 88.3°F (31.3°C). Weather in July »

Weather in August

The last month of the summer, August, is another hot month in Port Saint John, Florida, with an average temperature varying between 88.7°F (31.5°C) and 77.9°F (25.5°C). With an average high-temperature of 88.7°F (31.5°C) and an average low-temperature of 77.9°F (25.5°C), August is the warmest month. The average heat index in August is appraised at an extremely hot 107.6°F (42°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a hot month in Port Saint John, Florida, with an average temperature varying between 76.6°F (24.8°C) and 86.4°F (30.2°C). In September, the average high-temperature is almost the same as in August - a still tropical 86.4°F (30.2°C). Weather in September »

Weather in October

October, like September, in Port Saint John, Florida, is a moderately hot autumn month, with an average temperature fluctuating between 71.8°F (22.1°C) and 81.7°F (27.6°C). In Port Saint John, the average high-temperature in October is almost the same as in September - a warm 81.7°F (27.6°C). Weather in October »

Weather in November

November, the last month of the autumn in Port Saint John, is another warm month, with an average temperature varying between 65.3°F (18.5°C) and 75.7°F (24.3°C). In November, the average high-temperature marginally drops from 81.7°F (27.6°C) in October to a still warm 75.7°F (24.3°C). Weather in November »

Weather in December

December, the first month of the winter in Port Saint John, is also an agreeable month, with an average temperature fluctuating between 60.8°F (16°C) and 72.3°F (22.4°C). In December, the average high-temperature is relatively the same as in November - an agreeable 72.3°F (22.4°C). Weather in December »
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FAQ

What is the coldest month in Port Saint John?

January is the coldest month in Port Saint John, Florida, with an average high-temperature of 68.4°F (20.2°C) and an average low-temperature of 56.1°F (13.4°C).

How much does it rain in Port Saint John?

Throughout the year, there are 202 rainfall days, and 40.2" (1021mm) of precipitation is accumulated.

What are the months with the least sunshine in Port Saint John?

The months with the least sunshine in Port Saint John, Florida, are January, November and December, with an average of 6.1h of sunshine.

What is the month with the lowest UV index in Port Saint John?

The month with the lowest UV index is January, with an average maximum UV index of 4.

What is the least humid month in Port Saint John?

March is the least humid month, with an average relative humidity of 71%.

What is the driest month in Port Saint John?

The month with the least rainfall in Port Saint John is March, when the rain falls for 11 days and typically collects 1.42" (36mm) of precipitation.

When is Daylight Saving Time (DST) in Port Saint John?

On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts in Port Saint John, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from EDT to EST.

When is the highest UV index in Port Saint John?

May through September, with an average maximum UV index of 7, are months with the highest UV index in Port Saint John.

When are the longest days in Port Saint John?

With an average of 13h and 56min of daylight, June has the longest days of the year.

What month has the most sunshine in Port Saint John?

July has the most sunshine of the year in Port Saint John, with an average of 11h of sunshine.

What is the warmest month in Port Saint John?

August is the warmest month in Port Saint John, Florida, with an average high-temperature of 88.7°F (31.5°C) and an average low-temperature of 77.9°F (25.5°C).

What is the most humid month in Port Saint John?

August is the most humid month in Port Saint John, with an average relative humidity of 79%.

What is the wettest month in Port Saint John?

The month with the most rainfall in Port Saint John, Florida, is August, when the rain falls for 25.8 days and typically aggregates up to 6.81" (173mm) of precipitation.

What is the month with the shortest days in Port Saint John?

The month with the shortest days is December, with an average of 10h and 22min of daylight.

Average temperature
Port Saint John, FL

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).

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Average pressure
Port Saint John, FL

Average pressure - Port Saint John, FL

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).

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Average wind speed
Port Saint John, FL

Average wind speed - Port Saint John, FL

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).

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Average humidity
Port Saint John, FL

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%).

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Average rainfall
Port Saint John, FL

Average rainfall - Port Saint John, FL

The wettest month (with the highest rainfall) is August (6.81").
The driest month (with the least rainfall) is March (1.42").

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Average rainfall days
Port Saint John, FL

Average rainfall days - Port Saint John, FL

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).

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Average daylight / Average sunshine
Port Saint John, FL

Average daylight / Average sunshine - Port Saint John, FL

The month with the longest days is June (Average daylight: 13h and 56min).
The month with the shortest days is December (Average daylight: 10h and 22min).

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).

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Average sunshine days
Port Saint John, FL

Average sunshine days - Port Saint John, FL

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).

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Average UV index
Port Saint John, FL

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).

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Average visibility
Port Saint John, FL

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).

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