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 beginning of August reveals an average high-temperature of a still moderately hot 77.9°F (25.5°C), showing minimal deviation from the previous month. During August nights, Saint Johns witnesses a consistent average temperature of 59.4°F (15.2°C).Humidity
The average relative humidity in August is 80%.Rainfall
In Saint Johns, in August, during 14.2 rainfall days, 1.97" (50mm) of precipitation is typically accumulated. Throughout the year, there are 137.2 rainfall days, and 20.83" (529mm) of precipitation is accumulated.Snowfall
In Saint Johns, Michigan, snow does not fall in May through September.Daylight
In August, the average length of the day is 13h and 53min.On the first day of the month, sunrise is at 6:29 am and sunset at 8:59 pm. On the last day of August, sunrise is at 7:02 am and sunset at 8:14 pm EDT.
Sunshine
The average sunshine in August is 9.6h.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 5 during August translates into these guidelines:
Act with care - Obligation to protect against skin and eye damage is highlighted. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in August?
What is the average humidity in August?
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 long on average sun shines in August?
What are the months with the highest UV index?
What is the UV index reading in August in Saint Johns?
Average temperature in August
Saint Johns, MI
- Average high temperature in August: 77.9°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in August: 59.4°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in August
Saint Johns, MI
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in August
Saint Johns, MI
- Average wind speed in August: 6.7mph
The windiest month (with the highest average wind speed) is February (10mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in August
Saint Johns, MI
- Average humidity in August: 80%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (76%).
Average rainfall in August
Saint Johns, MI
- Average rainfall in August: 1.97"
The wettest month (with the highest rainfall) is May (2.6").
The driest month (with the least rainfall) is November (1.1").
Average rainfall days in August
Saint Johns, MI
- Average rainfall days in August: 14.2 days
The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is February (5 days).
Average snowfall in August
Saint Johns, MI
- Average snowfall in August: 0"
The month with the highest snowfall is February (4.29").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Saint Johns, MI
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (17.3 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, MI
- Average daylight in August: 13h and 5min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in August: 9h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in August
Saint Johns, MI
- Average sunshine days in August: 13.9 days
The month with the most sunshine days is September (16.4 days).
The month with the least sunshine days is February (9.2 days).
Average UV index in August
Saint Johns, MI
- Average UV index in August: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in August
Saint Johns, MI
- Average cloud cover in August: 35
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in August
Saint Johns, MI
- Average visibility in August: 5mi
The months with the highest visibility are March, April, May, June, July, October and November (6mi).
The months with the lowest visibility are January, February, August, September and December (5mi).
Saint Johns, Michigan, USA
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