Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
The onset of August notes an average high-temperature of a still warm 78.4°F (25.8°C), subtly shifted from July's 81°F (27.2°C). An average low-temperature of 57.7°F (14.3°C) is expected during August.Humidity
In August, the average relative humidity is 80%.Rainfall
In August, in Saint Johns, the rain falls for 10.2 days. Throughout August, 1.06" (27mm) of precipitation is accumulated. In Saint Johns, during the entire year, the rain falls for 111.5 days and collects up to 11.34" (288mm) of precipitation.Snowfall
In Saint Johns, snow does not fall in June through September.Daylight
The average length of the day in August is 13h and 46min.On the first day of the month, sunrise is at 6:00 am and sunset at 8:19 pm. On the last day of August, sunrise is at 6:30 am and sunset at 7:37 pm EDT.
Sunshine
In August, the average sunshine is 9.4h.UV index
The average daily maximum UV index in August is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The daily maximum UV index of 5 in August interprets into the following advice:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average August temperature?
What is the average humidity in August in Saint Johns?
How many days does it rain in August?
When it does not snow?
How many hours of daylight does Saint Johns have in August?
When are sunrise and sunset in August?
How many hours of sunshine does Saint Johns have in August?
How high is the UV index in August?
Average temperature in August
Saint Johns, PA
- Average high temperature in August: 78.4°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in August: 57.7°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in August
Saint Johns, PA
- Average pressure in August: 30"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in August
Saint Johns, PA
- Average wind speed in August: 5.1mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in August
Saint Johns, PA
- Average humidity in August: 80%
The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (78%).
Average rainfall in August
Saint Johns, PA
- Average rainfall in August: 1.06"
The wettest month (with the highest rainfall) is May (1.26").
The driest month (with the least rainfall) is September (0.55").
Average rainfall days in August
Saint Johns, PA
- Average rainfall days in August: 10.2 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is January (5.4 days).
Average snowfall in August
Saint Johns, PA
- Average snowfall in August: 0"
The month with the highest snowfall is February (1.81").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Saint Johns, PA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (9.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Saint Johns, PA
- Average daylight in August: 13h and 5min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in August: 9h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in August
Saint Johns, PA
- Average sunshine days in August: 18.1 days
The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is May (14.3 days).
Average UV index in August
Saint Johns, PA
- Average UV index in August: 5
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in August
Saint Johns, PA
- Average cloud cover in August: 40
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility in August
Saint Johns, PA
- Average visibility in August: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).
Saint Johns, Pennsylvania, USA
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