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 shift to August signals an average high-temperature of a still moderately hot 79.5°F (26.4°C), subtly varied from July's 80.4°F (26.9°C). A noticeable temperature swing characterizes Jamestown's August nights, dipping to an average of 54.1°F (12.3°C).Humidity
June, August and September, with an average relative humidity of 45%, are the least humid months.Rainfall
In Jamestown, in August, during 14.6 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. Throughout the year, in Jamestown, there are 117.3 rainfall days, and 14.17" (360mm) of precipitation is accumulated.Snowfall
In Jamestown, snow does not fall in June through September.Daylight
The average length of the day in August is 13h and 43min.On the first day of the month, sunrise is at 6:00 am and sunset at 8:15 pm. On the last day of August, sunrise is at 6:29 am and sunset at 7:34 pm MDT.
Sunshine
In Jamestown, the average sunshine in August is 11.6h.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 moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: In August, the maximum UV index of 5 translates into these guidelines:
Ensure safety - Sun damage prevention is strongly urged. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Experience reduced UV exposure by about half when donning 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 least humid month?
What is the average humidity in August in Jamestown?
How many days does it rain in August?
When it does not snow?
What is the average length of the day in August in Jamestown?
What time are sunrise and sunset in August?
How many hours of sunshine does Jamestown have in August?
When is the highest UV index in Jamestown?
What is the UV index reading in August?
Average temperature in August
Jamestown, CO
- Average high temperature in August: 79.5°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is December (35.2°F).
- Average low temperature in August: 54.1°F
The month with the highest average low temperature is July (55.2°F).
The coldest month (with the lowest average low temperature) is February (18°F).
Average pressure in August
Jamestown, CO
- Average pressure in August: 30.01"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are April, May and June (29.92"Hg).
Average wind speed in August
Jamestown, CO
- Average wind speed in August: 5.7mph
The windiest month (with the highest average wind speed) is January (7.3mph).
The calmest months (with the lowest average wind speed) are May, July, August and September (5.7mph).
Average humidity in August
Jamestown, CO
- Average humidity in August: 45%
The month with the highest relative humidity is February (70%).
The months with the lowest relative humidity are June, August and September (45%).
Average rainfall in August
Jamestown, CO
- Average rainfall in August: 1.26"
The wettest month (with the highest rainfall) is May (2.48").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in August
Jamestown, CO
- Average rainfall days in August: 14.6 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is November (3.3 days).
Average snowfall in August
Jamestown, CO
- Average snowfall in August: 0"
The month with the highest snowfall is April (7.76").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Jamestown, CO
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in August /
Average sunshine in August
Jamestown, CO
- Average daylight in August: 13h and 4min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in August: 11h and 4min
The months with the most sunshine are June and July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 6h and 36min).
Average sunshine days in August
Jamestown, CO
- Average sunshine days in August: 12.4 days
The month with the most sunshine days is January (22.2 days).
The month with the least sunshine days is July (9.9 days).
Average UV index in August
Jamestown, CO
- 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, November and December (UV index 2).
Average cloud cover in August
Jamestown, CO
- Average cloud cover in August: 18
The months with the most cloud cover are April and May (Cloud cover 28).
The month with the least cloud cover is September (Cloud cover 16).
Average visibility in August
Jamestown, CO
- Average visibility in August: 6mi
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).
Jamestown, Colorado, USA
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