August weather forecast
Foster City, MI

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Weather in August

The last month of the summer, August, is another warm month in Foster City, Michigan, with an average temperature varying between 75.7°F (24.3°C) and 55.9°F (13.3°C).

Temperature

Transitioning into August, Foster City records an average high-temperature of a still moderately hot 75.7°F (24.3°C), almost identical to July's 77.5°F (25.3°C). Foster City reports an average nighttime low-temperature of 55.9°F (13.3°C) in August.

Humidity

In August, the average relative humidity is 79%.

Rainfall

In August, the rain falls for 14 days. Throughout August, 1.89" (48mm) of precipitation is accumulated. In Foster City, during the entire year, the rain falls for 137.4 days and collects up to 22.83" (580mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in August is 14h and 5min.
On the first day of August, sunrise is at 5:34 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 6:11 am and sunset at 7:30 pm CDT.

Sunshine

The average sunshine in August is 9.5h.

UV index

June through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: In August, an average UV index of 5 transforms into the following instructions:
Make use of precautions - Suggestions to resist sunburn are communicated. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Updated: Aug 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in August?

In August, in Foster City, the average high-temperature is 75.7°F (24.3°C), and the average low-temperature is 55.9°F (13.3°C).

What is the average humidity in August?

The average relative humidity in August is 79%.

How many days does it rain in August?

In Foster City, during August, the rain falls for 14 days and regularly aggregates up to 1.89" (48mm) of precipitation.

When it does not snow?

In Foster City, snow does not fall in June through September.

How many hours of daylight does Foster City have in August?

In August, the average day length is 14h and 5min.

When is the sunrise / sunset in August?

In August, on the first day of the month, sunrise is at 5:34 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 6:11 am and sunset at 7:30 pm CDT.

How many hours of sunshine does Foster City have in August?

In August, the average sunshine duration is 9.5h.

What is the month with the highest UV index?

The months with the highest UV index are June through August, with an average maximum UV index of 5.

What is the UV index intensity in August?

In Foster City, the average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Foster City, MI

Average temperature in August - Foster City, MI
  • Average high temperature in August: 75.7°F

The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (21°F).

  • Average low temperature in August: 55.9°F

The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (10.2°F).

Average pressure in August
Foster City, MI

Average pressure in August - Foster City, MI
  • Average pressure in August: 29.94"Hg

The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in August
Foster City, MI

Average wind speed in August - Foster City, MI
  • Average wind speed in August: 6.3mph

The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

Average humidity in August
Foster City, MI

Average humidity in August - Foster City, MI
  • Average humidity in August: 79%

The month with the highest relative humidity is February (90%).
The month with the lowest relative humidity is May (72%).

Average rainfall in August
Foster City, MI

Average rainfall in August - Foster City, MI
  • Average rainfall in August: 1.89"

The wettest month (with the highest rainfall) is June (2.6").
The driest month (with the least rainfall) is January (1.14").

Average rainfall days in August
Foster City, MI

Average rainfall days in August - Foster City, MI
  • Average rainfall days in August: 14 days

The months with the highest number of rainy days are May, June and July (15.3 days).
The month with the least rainy days is February (5.7 days).

Average snowfall in August
Foster City, MI

Average snowfall in August - Foster City, MI
  • Average snowfall in August: 0"

The month with the highest snowfall is February (9.09").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in August
Foster City, MI

Average snowfall days in August - Foster City, MI
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (20.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in August /
Average sunshine in August
Foster City, MI

Average daylight in August / Average sunshine in August - Foster City, MI
  • Average daylight in August: 14h and 1min

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

  • Average sunshine in August: 9h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 2h and 48min).

Average sunshine days in August
Foster City, MI

Average sunshine days in August - Foster City, MI
  • Average sunshine days in August: 13.3 days

The month with the most sunshine days is September (15.5 days).
The month with the least sunshine days is February (9.1 days).

Average UV index in August
Foster City, MI

Average UV index in August - Foster City, MI
  • Average UV index in August: 5

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).

Average cloud cover in August
Foster City, MI

Average cloud cover in August - Foster City, MI
  • Average cloud cover in August: 39

The month with the most cloud cover is February (Cloud cover 70).
The month with the least cloud cover is July (Cloud cover 34).

Average visibility in August
Foster City, MI

Average visibility in August - Foster City, MI
  • Average visibility in August: 5mi

The months with the highest visibility are May, June, October and November (6mi).
The month with the lowest visibility is February (4mi).

Foster City, Michigan, USA

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