August weather forecast
Greeley, CO

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Weather in August

August in Greeley, Colorado, continues with the summer trend but with subtle signs of a forthcoming transition. Even though it is still a summer month, the maximum temperatures start to drop slightly. However, the rainfall retains its usual pattern, assisting in keeping the environment refreshed. With the sunset arriving a bit earlier than in the high summer months, the amount of daylight begins to reduce. Cumulative factors point toward an approaching shift in the season.

Temperature

The transition from July to August in Greeley brings an average high-temperature of a still hot 87.8°F (31°C), barely different from July's 89.1°F (31.7°C). In the face of high daytime temperatures, Greeley witnesses a consistent average nighttime low of 59.2°F (15.1°C) during August.

Heat index

In August, the average heat index is estimated at a hot 89.6°F (32°C). If one endures exposure and continues to be active, it might result in tiredness and heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', reflects the blend of air temperature and relative humidity to give a temperature impression. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.

Humidity

August and September, with an average relative humidity of 44%, are the least humid months.

Rainfall

In Greeley, in August, during 8.5 rainfall days, 0.59" (15mm) of precipitation is typically accumulated. In Greeley, during the entire year, the rain falls for 71.4 days and collects up to 7.6" (193mm) of precipitation.

Snowfall

In Greeley, snow does not fall in June through September.

Daylight

The average length of the day in August in Greeley, Colorado, is 13h and 43min.
On the first day of the month, sunrise is at 5:57 am and sunset at 8:13 pm. On the last day of August, in Greeley, sunrise is at 6:26 am and sunset at 7:31 pm MDT.

Sunshine

The average sunshine in August in Greeley is 11.8h.

UV index

The months with the highest UV index in Greeley are June through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 6 in August translates into this advice:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
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Frequently asked questions

How hot is it in Greeley in August?

The high-temperature in Greeley, Colorado, during August is 87.8°F (31°C) and the low-temperature is 59.2°F (15.1°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in August is estimated at 89.6°F (32°C).

What are the least humid months in Greeley?

August and September, with an average relative humidity of 44%, are the least humid months in Greeley, Colorado.

What is the average humidity in August in Greeley?

In Greeley, the average relative humidity in August is 44%.

How much does it rain in Greeley in August?

In Greeley, Colorado, during August, the rain falls for 8.5 days and regularly aggregates up to 0.59" (15mm) of precipitation.

When it does not snow in Greeley?

June through September are months without snowfall in Greeley.

What is the average length of the day in August in Greeley?

The average day length in August in Greeley, Colorado, is 13h and 43min.

When are sunrise and sunset in August in Greeley?

In August, on the first day of the month, sunrise is at 5:57 am and sunset at 8:13 pm. On the last day of the month, in Greeley, Colorado, sunrise is at 6:26 am and sunset at 7:31 pm MDT.

How many hours of sunshine does Greeley have in August?

The average sunshine duration in August in Greeley is 11.8h.

What are the months with the highest UV index in Greeley?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Greeley, Colorado.

What is the UV index intensity in August in Greeley?

The average daily maximum UV index in August in Greeley is 6. A UV Index estimate of 6 to 7 represents a high health risk 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
Greeley, CO

Average temperature in August - Greeley, CO
  • Average high temperature in August: 87.8°F

The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is December (38.3°F).

  • Average low temperature in August: 59.2°F

The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is December (20.1°F).

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Average pressure in August
Greeley, CO

Average pressure in August - Greeley, CO
  • Average pressure in August: 29.97"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in August
Greeley, CO

Average wind speed in August - Greeley, CO
  • Average wind speed in August: 6.2mph

The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is December (6mph).

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Average humidity in August
Greeley, CO

Average humidity in August - Greeley, CO
  • Average humidity in August: 44%

The months with the highest relative humidity are January and December (64%).
The months with the lowest relative humidity are August and September (44%).

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Average rainfall in August
Greeley, CO

Average rainfall in August - Greeley, CO
  • Average rainfall in August: 0.59"

The wettest month (with the highest rainfall) is May (1.61").
The driest month (with the least rainfall) is December (0.2").

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Average rainfall days in August
Greeley, CO

Average rainfall days in August - Greeley, CO
  • Average rainfall days in August: 8.5 days

The month with the highest number of rainy days is July (11.4 days).
The month with the least rainy days is November (1.6 days).

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Average snowfall in August
Greeley, CO

Average snowfall in August - Greeley, CO
  • Average snowfall in August: 0"

The month with the highest snowfall is February (2.36").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in August
Greeley, CO

Average snowfall days in August - Greeley, CO
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (5.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in August /
Average sunshine in August
Greeley, CO

Average daylight in August / Average sunshine in August - Greeley, 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 18min).

  • Average sunshine in August: 11h and 5min

The month with the most sunshine is June (Average sunshine: 11h and 54min).
The months with the least sunshine are February and December (Average sunshine: 6h and 36min).

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Average sunshine days in August
Greeley, CO

Average sunshine days in August - Greeley, CO
  • Average sunshine days in August: 18.8 days

The month with the most sunshine days is December (25.9 days).
The month with the least sunshine days is July (16.7 days).

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Average UV index in August
Greeley, CO

Average UV index in August - Greeley, CO
  • Average UV index in August: 6

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in August
Greeley, CO

Average cloud cover in August - Greeley, CO
  • Average cloud cover in August: 17

The month with the most cloud cover is February (Cloud cover 29).
The month with the least cloud cover is June (Cloud cover 16).

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Average visibility in August
Greeley, CO

Average visibility in August - Greeley, 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).

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Greeley, Colorado, USA

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