Climate and monthly weather forecastNiwot, CO
Climate and monthly weather forecast
Weather in January
January, the same as December, is a wintry winter month in Niwot, Colorado, with temperature in the range of an average high of 40.1°F (4.5°C) and an average low of 21.2°F (-6°C). Niwot's transition from December to January introduces an average high-temperature of a still cold 40.1°F (4.5°C), marking an insignificant variation from the 39°F (3.9°C). Weather in January »Weather in February
February, the last month of the winter in Niwot, is also a wintry month, with an average temperature varying between 40.3°F (4.6°C) and 20.8°F (-6.2°C). The arrival of February marks a slight shift to an average high-temperature of a still cold 40.3°F (4.6°C) from January's 40.1°F (4.5°C). Weather in February »Weather in March
March, the first month of the spring in Niwot, is a fresh month, with an average temperature ranging between max 51.4°F (10.8°C) and min 29.7°F (-1.3°C). In March, the meteorological conditions change with the average high-temperature moving from a wintry 40.3°F (4.6°C) in February to a fresh 51.4°F (10.8°C). Weather in March »Weather in April
April in Niwot, Colorado, is a refreshing spring month, with an average temperature ranging between max 57.7°F (14.3°C) and min 34.3°F (1.3°C). As March transitions into April, Niwot notices a gentle rise in the average high-temperature, transitioning from a cool 51.4°F (10.8°C) to a moderate 57.7°F (14.3°C). Weather in April »Weather in May
The last month of the spring, May, is a refreshing month in Niwot, Colorado, with temperature in the range of an average low of 42.6°F (5.9°C) and an average high of 66.4°F (19.1°C). The start of May brings a subtle shift in the average high-temperature, edging up from April's mild 57.7°F (14.3°C) to a comfortable 66.4°F (19.1°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Niwot, Colorado, with an average temperature fluctuating between 81.1°F (27.3°C) and 54.3°F (12.4°C). June's arrival signals a significant increase in average high-temperatures, soaring from May's comfortable 66.4°F (19.1°C) to a moderately hot 81.1°F (27.3°C). Weather in June »Weather in July
July, like June, in Niwot, Colorado, is another warm summer month, with an average temperature fluctuating between 59.2°F (15.1°C) and 85.6°F (29.8°C). In Niwot, the average temperatures in July are the highest, with a peak at 85.6°F (29.8°C) and a low of 59.2°F (15.1°C). July's heat index is appraised at a hot 86°F (30°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Niwot, Colorado, with an average temperature varying between 84.7°F (29.3°C) and 57.4°F (14.1°C). The advent of August brings an average high-temperature of a still warm 84.7°F (29.3°C), almost identical to the preceding month. Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Niwot, Colorado, with an average temperature varying between 77.2°F (25.1°C) and 51.1°F (10.6°C). Start of September brings a slight shift in the average high-temperature, dipping a bit from August's warm 84.7°F (29.3°C) to a still moderately hot 77.2°F (25.1°C). Weather in September »Weather in October
October, like September, in Niwot, Colorado, is another refreshing autumn month, with an average temperature fluctuating between 38.3°F (3.5°C) and 61.5°F (16.4°C). October is marked by a significant decrease, with the average high-temperature retreating from a warm 77.2°F (25.1°C) in September to a comfortable 61.5°F (16.4°C). Weather in October »Weather in November
November, the last month of the autumn in Niwot, is also a fresh month, with an average temperature fluctuating between 50.4°F (10.2°C) and 29.1°F (-1.6°C). Niwot observes a minor decrease in the average high-temperature with the arrival of November, falling from October's comfortable 61.5°F (16.4°C) to a cool 50.4°F (10.2°C). Weather in November »Weather in December
December, the first month of the winter in Niwot, is also a wintry month, with an average temperature ranging between max 39°F (3.9°C) and min 19.9°F (-6.7°C). During the coldest month, December, temperatures average a high of 39°F (3.9°C) and a low of 19.9°F (-6.7°C). Weather in December »Updated: Aug 8, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January is the month with the least rainfall. Rain falls for 3.5 days and accumulates 0.35" (9mm) of precipitation.
Throughout the year, there are 105.4 rainfall days, and 10.43" (265mm) of precipitation is accumulated.
January through May, October through December are months with snowfall.
In Niwot, during the entire year, snow falls for 37.1 days and aggregates up to 26.73" (679mm) of snow.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
February is the most humid month, with an average relative humidity of 66%.
The month with the least sunshine is February, with an average of 6.8h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.
May is the month with the most rainfall in Niwot. Rain falls for 15 days and accumulates 1.69" (43mm) of precipitation.
In Niwot, snow does not fall in June through September.
With an average of 15h and 0min of daylight, June has the longest days of the year.
With an average of 11.9h of sunshine, June has the most sunshine of the year.
July is the warmest month, exhibiting average temperatures of 85.6°F (29.8°C) at the peak and 59.2°F (15.1°C) at the base.
July and August, with an average maximum UV index of 6, are months with the highest UV index.
With an average relative humidity of 42%, August is the least humid month.
The month with the most snowfall is November, when snow falls for 5.4 days and typically aggregates up to 4.41" (112mm) of snow.
The coldest month is December, with an average high-temperature of 39°F (3.9°C) and an average low-temperature of 19.9°F (-6.7°C).
With an average of 9h and 24min of daylight, December has the shortest days of the year.
Average temperature
Niwot, CO
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).
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).
Average pressure
Niwot, CO
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30"Hg - Average pressure in April:
29.91"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.99"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.12"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).
Average wind speed
Niwot, CO
- Average wind speed in January:
6.2mph - Average wind speed in February:
6mph - Average wind speed in March:
6.6mph - Average wind speed in April:
6.6mph - Average wind speed in May:
5.9mph - Average wind speed in June:
6mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.6mph - Average wind speed in September:
5.6mph - Average wind speed in October:
5.7mph - Average wind speed in November:
5.9mph - Average wind speed in December:
5.7mph
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).
Average humidity
Niwot, CO
The month with the highest relative humidity is February (66%).
The month with the lowest relative humidity is August (42%).
Average rainfall
Niwot, CO
- Average rainfall in January:
0.35" - Average rainfall in February:
0.51" - Average rainfall in March:
0.83" - Average rainfall in April:
1.14" - Average rainfall in May:
1.69" - Average rainfall in June:
0.94"
- Average rainfall in July:
1.54" - Average rainfall in August:
0.98" - Average rainfall in September:
0.75" - Average rainfall in October:
0.67" - Average rainfall in November:
0.63" - Average rainfall in December:
0.39"
The wettest month (with the highest rainfall) is May (1.69").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days
Niwot, CO
- Average rainfall days in January:
3.5 days - Average rainfall days in February:
3.6 days - Average rainfall days in March:
7.7 days - Average rainfall days in April:
10.7 days - Average rainfall days in May:
15 days - Average rainfall days in June:
11.2 days
- Average rainfall days in July:
16 days - Average rainfall days in August:
13.3 days - Average rainfall days in September:
9.7 days - Average rainfall days in October:
5.9 days - Average rainfall days in November:
4.1 days - Average rainfall days in December:
4.7 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).
Average snowfall
Niwot, CO
The month with the highest snowfall is November (4.41").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Niwot, CO
- Average snowfall days in January:
5.8 days - Average snowfall days in February:
7.7 days - Average snowfall days in March:
4.9 days - Average snowfall days in April:
3.3 days - Average snowfall days in May:
1.3 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.1 days - Average snowfall days in October:
2.5 days - Average snowfall days in November:
5.4 days - Average snowfall days in December:
6.1 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).
Average daylight / Average sunshine
Niwot, CO
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 24min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
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 January:
7h and 6min - Average sunshine in February:
6h and 48min - Average sunshine in March:
9h and 0min - Average sunshine in April:
10h and 42min - Average sunshine in May:
11h and 0min - Average sunshine in June:
11h and 54min
- Average sunshine in July:
11h and 48min - Average sunshine in August:
11h and 42min - Average sunshine in September:
11h and 0min - Average sunshine in October:
7h and 24min - Average sunshine in November:
7h and 18min - Average sunshine in December:
6h and 54min
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).
Average sunshine days
Niwot, CO
- Average sunshine days in January:
23.4 days - Average sunshine days in February:
18.7 days - Average sunshine days in March:
18.8 days - Average sunshine days in April:
15.3 days - Average sunshine days in May:
13 days - Average sunshine days in June:
15.1 days
- Average sunshine days in July:
9.3 days - Average sunshine days in August:
11.6 days - Average sunshine days in September:
16.5 days - Average sunshine days in October:
20.6 days - Average sunshine days in November:
22.4 days - Average sunshine days in December:
22.5 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).
Average UV index
Niwot, CO
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).
Average cloud cover
Niwot, CO
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).
Average visibility
Niwot, CO
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).
