August weather forecast
Niwot, CO

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Weather in August

August, the last month of the summer in Niwot, is also a moderately hot month, with an average temperature fluctuating between 84.7°F (29.3°C) and 57.4°F (14.1°C).

Temperature

The advent of August observes an average high-temperature of a still moderately hot 84.7°F (29.3°C), nearly identical to July's 85.6°F (29.8°C). Despite the intense daytime heat, Niwot sustains a steady low-temperature average of 57.4°F (14.1°C) during August.

Heat index

Throughout August, the heat index is estimated at 84.2°F (29°C). Exhaustion becomes probable with enduring exposure and activity, potentially causing heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold particular significance for children. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.

Humidity

August is the least humid month in Niwot, Colorado, with an average relative humidity of 42%.

Rainfall

In Niwot, in August, during 13.3 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. In Niwot, during the entire year, the rain falls for 105.4 days and collects up to 10.43" (265mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in August in Niwot is 13h and 43min.
On the first day of August in Niwot, sunrise is at 5:59 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 6:28 am and sunset at 7:33 pm MDT.

Sunshine

In August, the average sunshine is 11.7h.

UV index

The months with the highest UV index are July and August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the average person.
Note: In August, the maximum UV index of 6 translates into these guidelines:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
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Frequently asked questions

How hot is it in Niwot in August?

In August, the average high-temperature and low-temperature in Niwot, Colorado, are 84.7°F (29.3°C) and 57.4°F (14.1°C) respectively. In August, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 84.2°F (29°C).

What is the least humid month in Niwot?

August is the least humid month in Niwot, with an average relative humidity of 42%.

What is the average humidity in August in Niwot?

In August, the average relative humidity is 42%.

How many days does it rain in August in Niwot?

In Niwot, during August, the rain falls for 13.3 days and regularly aggregates up to 0.98" (25mm) of precipitation.

When it does not snow in Niwot?

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

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

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

When are sunrise and sunset in August in Niwot?

On the first day of August, sunrise is at 5:59 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 6:28 am and sunset at 7:33 pm MDT.

How many hours of sunshine does Niwot have in August?

The average sunshine duration in August is 11.7h.

When is the highest UV index in Niwot?

July and August, with an average maximum UV index of 6, are months with the highest UV index in Niwot, Colorado.

How high is the UV index in August in Niwot?

In August, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high hazard to health from unsafe exposure to Sun's UV rays.
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
Niwot, CO

Average temperature in August - Niwot, CO
  • Average high temperature in August: 84.7°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is December (39°F).

  • Average low temperature in August: 57.4°F

The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is December (19.9°F).

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Average pressure in August
Niwot, CO

Average pressure in August - Niwot, CO
  • Average pressure in August: 30"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are April and June (29.91"Hg).

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Average wind speed in August
Niwot, CO

Average wind speed in August - Niwot, CO
  • Average wind speed in August: 5.6mph

The windiest months (with the highest average wind speed) are March and April (6.6mph).
The calmest months (with the lowest average wind speed) are August and September (5.6mph).

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Average humidity in August
Niwot, CO

Average humidity in August - Niwot, CO
  • Average humidity in August: 42%

The month with the highest relative humidity is February (66%).
The month with the lowest relative humidity is August (42%).

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Average rainfall in August
Niwot, CO

Average rainfall in August - Niwot, CO
  • Average rainfall in August: 0.98"

The wettest month (with the highest rainfall) is May (1.69").
The driest month (with the least rainfall) is January (0.35").

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Average rainfall days in August
Niwot, CO

Average rainfall days in August - Niwot, CO
  • Average rainfall days in August: 13.3 days

The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is January (3.5 days).

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Average snowfall in August
Niwot, CO

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

The month with the highest snowfall is November (4.41").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in August
Niwot, CO

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

The month with the highest number of snowfall days is February (7.7 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in August / Average sunshine in August - Niwot, 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 month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 48min).

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Average sunshine days in August
Niwot, CO

Average sunshine days in August - Niwot, CO
  • Average sunshine days in August: 11.6 days

The month with the most sunshine days is January (23.4 days).
The month with the least sunshine days is July (9.3 days).

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Average UV index in August
Niwot, CO

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

The months with the highest UV index are 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
Niwot, CO

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

The months with the most cloud cover are April and May (Cloud cover 26).
The months with the least cloud cover are June and September (Cloud cover 16).

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Average visibility in August
Niwot, CO

Average visibility in August - Niwot, 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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Niwot, Colorado, USA

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