April weather forecast
Niwot, CO

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Weather in April

April is a moderate spring month in Niwot, Colorado, with temperature in the range of an average low of 34.3°F (1.3°C) and an average high of 57.7°F (14.3°C).

Temperature

The onset of April introduces a subtle rise in the average high-temperature, nudging from a cool 51.4°F (10.8°C) in March to a moderate 57.7°F (14.3°C). April nights in Niwot present a stark temperature decrease to a cold 34.3°F (1.3°C).

Humidity

In Niwot, the average relative humidity in April is 53%.

Rainfall

In Niwot, in April, during 10.7 rainfall days, 1.14" (29mm) 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

Months with snowfall are January through May, October through December. In Niwot, Colorado, in April, snow falls for 3.3 days, with typically accumulated 4.29" (109mm) of snow. Throughout the year, there are 37.1 snowfall days, and 26.73" (679mm) of snow is accumulated.

Daylight

In Niwot, the average length of the day in April is 13h and 18min.
On the first day of April, sunrise is at 6:43 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 7:55 pm MDT.

Sunshine

In Niwot, Colorado, the average sunshine in April is 10.7h.

UV index

In Niwot, the average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 3 in April interprets into the following advice:
Guard yourself - Avoiding sunburn is suggested. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
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Frequently asked questions

What are the temperatures in Niwot in April?

In Niwot, in April, the average high-temperature is 57.7°F (14.3°C), and the average low-temperature is 34.3°F (1.3°C).

What is the average humidity in April in Niwot?

In April, the average relative humidity in Niwot, Colorado, is 53%.

How much does it rain in Niwot in April?

In Niwot, in April, it is raining for 10.7 days, with typically 1.14" (29mm) of accumulated precipitation.

How much does it snow in Niwot in April?

In Niwot, in April, snow falls for 3.3 days, with typically accumulated 4.29" (109mm) of snow.

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

In April, the average day length is 13h and 18min.

When are sunrise and sunset in April in Niwot?

On the first day of April, sunrise is at 6:43 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 7:55 pm MDT.

How many hours of sunshine does Niwot have in April?

The average sunshine duration in April in Niwot is 10.7h.

What is the UV index reading in April in Niwot?

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

Average temperature in April
Niwot, CO

Average temperature in April - Niwot, CO
  • Average high temperature in April: 57.7°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 April: 34.3°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 April
Niwot, CO

Average pressure in April - Niwot, CO
  • Average pressure in April: 29.91"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 April
Niwot, CO

Average wind speed in April - Niwot, CO
  • Average wind speed in April: 6.6mph

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 April
Niwot, CO

Average humidity in April - Niwot, CO
  • Average humidity in April: 53%

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 April
Niwot, CO

Average rainfall in April - Niwot, CO
  • Average rainfall in April: 1.14"

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 April
Niwot, CO

Average rainfall days in April - Niwot, CO
  • Average rainfall days in April: 10.7 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 April
Niwot, CO

Average snowfall in April - Niwot, CO
  • Average snowfall in April: 4.29"

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 April
Niwot, CO

Average snowfall days in April - Niwot, CO
  • Average snowfall days in April: 3.3 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 April /
Average sunshine in April
Niwot, CO

Average daylight in April / Average sunshine in April - Niwot, CO
  • Average daylight in April: 13h and 2min

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 April: 10h 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 April
Niwot, CO

Average sunshine days in April - Niwot, CO
  • Average sunshine days in April: 15.3 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 April
Niwot, CO

Average UV index in April - Niwot, CO
  • Average UV index in April: 3

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 April
Niwot, CO

Average cloud cover in April - Niwot, CO
  • Average cloud cover in April: 26

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 April
Niwot, CO

Average visibility in April - Niwot, CO
  • Average visibility in April: 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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