Climate and monthly weather forecast
Port Saint John, FL

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Weather in January

January, like December, is another pleasant winter month in Port Saint John, Florida, with an average temperature fluctuating between 68.4°F (20.2°C) and 56.1°F (13.4°C). With its high average temperature of 68.4°F (20.2°C) and a low of 56.1°F (13.4°C), January is regarded as the coldest month. Weather in January »

Weather in February

The last month of the winter, February, is also an agreeable month in Port Saint John, Florida, with an average temperature fluctuating between 59°F (15°C) and 71.2°F (21.8°C). Port Saint John's weather in February, with an average high-temperature of a still pleasant 71.2°F (21.8°C), subtly shifts from January's 68.4°F (20.2°C). Weather in February »

Weather in March

March, the first month of the spring in Port Saint John, is a warm month, with an average temperature varying between 61.5°F (16.4°C) and 74.3°F (23.5°C). The weather during March records an average high-temperature of a moderately hot 74.3°F (23.5°C), closely mirroring 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 start of April marks an average high-temperature of a still moderately hot 79.3°F (26.3°C), hardly distinguishable from the conditions in March. 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 ranging between min 71.4°F (21.9°C) and max 83.1°F (28.4°C). With the onset of May, a modest change to a still moderately hot 83.1°F (28.4°C) from April's 79.3°F (26.3°C) is noted in high-temperature. Weather in May »

Weather in June

June, the first month of the summer in Port Saint John, is a tropical month, with temperature in the range of an average low of 75.7°F (24.3°C) and an average high of 87.1°F (30.6°C). The arrival of June brings an average high-temperature of a hot 87.1°F (30.6°C), closely following the temperature pattern of May. Weather in June »

Weather in July

July, the same as June, in Port Saint John, Florida, is another tropical summer month, with an average temperature fluctuating between 88.3°F (31.3°C) and 76.8°F (24.9°C). Entering July, the average high-temperature is recorded at a still tropical 88.3°F (31.3°C), exhibiting a minimal shift from June's 87.1°F (30.6°C). 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 registers as the month with the highest average temperatures, reaching 88.7°F (31.5°C) at its peak and 77.9°F (25.5°C) at the lowest. The heat index for August is appraised at a blisteringly hot 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 hot month, with temperature in the range of an average high of 86.4°F (30.2°C) and an average low of 76.6°F (24.8°C). In September, Port Saint John experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 88.7°F (31.5°C) in August to a still hot 86.4°F (30.2°C). Weather in September »

Weather in October

October, like September, in Port Saint John, Florida, is another warm autumn month, with temperature in the range of an average high of 81.7°F (27.6°C) and an average low of 71.8°F (22.1°C). The onset of October manifests an average high-temperature of a moderately hot 81.7°F (27.6°C), demonstrating a minor variation from the preceding month. Weather in October »

Weather in November

The last month of the autumn, November, is another warm month in Port Saint John, Florida, with an average temperature varying between 65.3°F (18.5°C) and 75.7°F (24.3°C). November marks a gentle change in average high-temperature, declining from October's 81.7°F (27.6°C) to a still moderately hot 75.7°F (24.3°C). Weather in November »

Weather in December

December, the first month of the winter in Port Saint John, is still a pleasant month, with an average temperature varying between 72.3°F (22.4°C) and 60.8°F (16°C). Entering December, Port Saint John's average high-temperature reads a pleasant 72.3°F (22.4°C), indicating a close resemblance to the previous month's climate. Weather in December »
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Frequently asked questions

What month is the coldest in Port Saint John?

Port Saint John, Florida, experiences its average lowest temperatures in January, reaching a peak of 68.4°F (20.2°C) and a minimum of 56.1°F (13.4°C).

How much does it rain in Port Saint John?

In Port Saint John, Florida, during the entire year, the rain falls for 202 days and collects up to 40.2" (1021mm) of precipitation.

What is the month with the least sunshine in Port Saint John?

January, November and December, with an average of 6.1h of sunshine, are months with the least sunshine.

When is 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 in Port Saint John, with an average relative humidity of 71%.

What is the driest month in Port Saint John?

March is the month with the least rainfall. Rain falls for 11 days and accumulates 1.42" (36mm) of precipitation.

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

On Sunday, March 10. 2024, 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 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.

What are the months with 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.

When are the longest days in Port Saint John?

June has the longest days of the year in Port Saint John, with an average of 13h and 54min of daylight.

What month has the most sunshine in Port Saint John?

July has the most sunshine of the year, with an average of 11h of sunshine.

What are the warmest months in Port Saint John?

In Port Saint John, August is the month with the highest recorded average temperatures, measuring a high of 88.7°F (31.5°C) and a low of 77.9°F (25.5°C).

What is the most humid month in Port Saint John?

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

What is the wettest month in Port Saint John?

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.

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

With an average of 10h and 24min of daylight, December has the shortest days of the year in Port Saint John.

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 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).

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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Port Saint John, Florida, USA

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