Climate and monthly weather forecastFort Collins, CO
Climate and monthly weather forecast
The climate of Fort Collins
Fort Collins situates in the northern part of the state of Colorado, USA and boasts a Mid-latitude steppe, classified as BSk in the Köppen climate system. Weather conditions display a sharp contrast in temperatures throughout the year, with a peak of 82.9°F (28.3°C) in July and a trough of 19.4°F (-7°C) in February.Variations in weather parameters over the year manifest in diverse ways. In terms of rainfall, yearly distribution reveals an augmented pattern towards May with a monthly average of 1.5" (38mm), then declines to its lowest point of 0.12" (3mm) in January. There are noticeable snowfall chances from December to April, with March seeing the most at 3.27" (83mm). Conversely, zero snowfalls get logged between May to November.
Concerning daylight hours, June provides the most extended day length with 15 hours while December offers the least with 9.3 hours. Amount of sunshine coincides with the daylight hours, tackling its maximum in June at 11.8 hours and bottoming out in December at 6.9 hours. Monthly UV index peaks at 6 in July, bending down to 2 from November to February.
Noticeable patterns include the highest relative humidity of 67% in February and low levels dropping to 45% during the summer months. The highest average wind speeds are seen in April at 7.6mph (12.2km/h), while the lowest speeds occur in August at 5.6mph (9km/h).
The best time to visit Fort Collins
Observing climatic factors, the ideal visiting period extends from May to September. During these months, the city experiences moderate to high temperatures, transitioning from 63.3°F (17.4°C) to 82.9°F (28.3°C). Although July is the warmest month, it also heralds the highest average rainfall at 1.38" (35mm) spread across 14.6 days. From a traveler's perspective, fewer rainy days coupled with moderate temperatures makes May and September more appealing.The worst time to visit Fort Collins
On the opposite end, winter months from December to February show the harshest weather conditions. The average minimum temperature slinks down to 18.7°F (-7.4°C) in December. Those months also intensify the chance of snowfall with January witnessing up to 2.56" (65mm) of snow spread over 4.3 days. Visitors may be discouraged by the short daylight hours, averaging from 9.3 hours to 10.7 hours, and low sunshine duration, averaging from 6.9 hours to 7 hours.Spring weather in Fort Collins
Spring appears in Fort Collins from March to May, witnessing a gradual rise in temperatures from 48.4°F (9.1°C) to 63.3°F (17.4°C). It is the season with the highest rainfall, seeing up to 1.5" (38mm) in May. The city gets sunlight for a considerable duration, from 12 hours to 14.5 hours, with sunshine hours increasing from 8.9 hours to 10.8 hours. It also marks the transition from snowfall months, with March seeing 2.2" (56mm) of snow over 2.3 days.Summer weather in Fort Collins
June to August represent summer months, bringing temperatures ranging from 78.3°F (25.7°C) to 82.9°F (28.3°C). These months accommodate the lengthiest daylight hours, extending from 14.7 hours to 15 hours, and ample sunshine ranging from 11.7 hours to 11.8 hours. Although generally dry, July sees the highest rainfall of the season at 1.38" (35mm), spanning over 14.6 days. Importantly, there's no logged snowfall during this season.Autumn weather in Fort Collins
Autumn witnesses a decline in temperatures, from 74.5°F (23.6°C) in September to 46.9°F (8.3°C) in November. The amount of sunlight reduces gradually from 12.4 hours to 9.9 hours, and so does sunshine duration from 11 hours to 7.2 hours. Although rainfall decreases steadily across these months, November sees slight snowfall, amounting to 2.48" (63mm) over 2.4 days.Winter weather in Fort Collins
Winter commences in December, featuring cold temperatures, short daylight hours, and increased snow chances. The average high temperature falls from 36.1°F (2.3°C) in December to 37.8°F (3.2°C) in February. December logs just 9.3 hours of daylight, the lowest in the year. Snowfall can reach up to 2.56" (65mm) in January, spanning over 4.3 days. The region also welcomes a high UV index of 2 across these months, placing winter as a season with diverse weather parameters.Weather in January
January, in Fort Collins, Colorado, is the coldest month of the year with the peak temperatures peaking no more than 37.9°F (3.3°C), while the lowest recorded temperature is a chilling 20.3°F (-6.5°C). Snow is a common sight in this month, blanketing the town in a beautiful white layer. Weather in January »Weather in February
In February, the weather remains cold in Fort Collins, although it is marginally warmer than January. This period features 2.56" (65mm) of snowfall, continuing the winter trend observed previously. However, the snowfall is slightly less when compared to the following month. Weather in February »Weather in March
March signals the beginning of warmer temperatures and more sunshine in Fort Collins. The peak temperature rises to a pleasant 48.4°F (9.1°C), offering a reprieve from the previous months of winter chill. Rainfall reaches a new annual high with 0.51" (13mm) over approximately four days. Weather in March »Weather in April
April, in Fort Collins, welcomes an appreciable increase in temperature with highs reaching up to 54.5°F (12.5°C). Despite having more rainfall than March, with a record of 0.75" (19mm), landscape views in Fort Collins are more vibrant with the budding of flowers. Weather in April »Weather in May
May witnesses a significant rise in warmth and humidity. With the highest temperature soaring to 63.3°F (17.4°C), spring is in full swing in Fort Collins during May. The weather in this month follows a relatively high precipitation trend, recording 1.5" (38mm) of rainfall. Weather in May »Weather in June
The advent of summer in June brings a surge in temperature reaching around 78.3°F (25.7°C). This month is characterized by a decrease in humidity and the absence of snowfall. It is an ideal moment for taking part in outdoor activities such as hiking and cycling. Weather in June »Weather in July
In Fort Collins, July marks the zenith of summer with the highest annual average temperature, peaking at 82.9°F (28.3°C). Weather is consistently hot throughout the month, beating June’s average temperature. Despite the heated conditions, there's no lower likelihood of rainfall. Weather in July »Weather in August
August continues the warmth trend of July with temperatures hovering around 81.5°F (27.5°C) during the day. This epitomizes the summer season in Fort Collins. Although there is a slight dip in temperature, the weather continues to promote enjoyment of outdoor activities. Weather in August »Weather in September
September in Fort Collins brings a noticeable drop in temperature, to a mild 74.5°F (23.6°C), indicating the onset of the fall season. This month marks the transition from the peak summer heat to a much cooler autumn climate. Weather in September »Weather in October
In October, the weather in Fort Collins shifts towards a cooler trend with decreasing temperatures and increasing rainfall. The chilly breeze and the decreased daylight hours herald the onset of winter. Outdoor activities gradually dwindle, and locals start preparing for winter. Weather in October »Weather in November
November sees a substantial decrease in temperature in Fort Collins, with average highs dropping down to 46.9°F (8.3°C). Snowfall marks its presence with an average of 2.48" (63mm). The landscape morphs, donning a white blanket of snow. Weather in November »Weather in December
December is characterized by the return of the cold winter weather in Fort Collins. The average maximum temperature decreases to 36.1°F (2.3°C), while the minimum plunges to a frigid 18.7°F (-7.4°C); this denotes the year's end on a chilly note. Weather in December »Updated: Feb 10, 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
The month with the least rainfall is January, when the rain falls for 1.2 days and typically collects 0.12" (3mm) of precipitation.
In Fort Collins, Colorado, during the entire year, the rain falls for 73.4 days and collects up to 7.64" (194mm) of precipitation.
Months with snowfall in Fort Collins, Colorado, are January through May, October through December.
In Fort Collins, Colorado, during the entire year, snow falls for 21.2 days and aggregates up to 15.98" (406mm) of snow.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
With an average relative humidity of 67%, February is the most humid month.
February has the least sunshine of the year in Fort Collins, with an average of 6.7h 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.
April is the month with the most snowfall. Snow falls for 3.1 days and accumulates 3.27" (83mm) of snow.
May is the month with the most rainfall in Fort Collins. Rain falls for 12.1 days and accumulates 1.5" (38mm) of precipitation.
June, August and September, with an average relative humidity of 45%, are the least humid months.
June through September are months without snowfall.
With an average of 15h and 0min of daylight, June has the longest days of the year.
The month with the most sunshine in Fort Collins is June, with an average of 11.8h of sunshine.
Fort Collins, Colorado, reaches its average highest temperatures in July, measuring 82.9°F (28.3°C) at the peak and 56.8°F (13.8°C) at the lowest.
July is the month with the highest UV index, with an average maximum UV index of 6.
December brings the lowest temperatures, with an average high of 36.1°F (2.3°C) and an average low of 18.7°F (-7.4°C).
The month with the shortest days in Fort Collins, Colorado, is December, with an average of 9h and 18min of daylight.
Average temperature
Fort Collins, CO
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (36.1°F).
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is December (18.7°F).
Average pressure
Fort Collins, CO
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
29.99"Hg - Average pressure in April:
29.91"Hg - Average pressure in May:
29.91"Hg - Average pressure in June:
29.9"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
29.99"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Fort Collins, CO
- Average wind speed in January:
7.2mph - Average wind speed in February:
7mph - Average wind speed in March:
7.5mph - Average wind speed in April:
7.6mph - Average wind speed in May:
6.5mph - Average wind speed in June:
6.3mph
- Average wind speed in July:
5.9mph - Average wind speed in August:
5.6mph - Average wind speed in September:
6mph - Average wind speed in October:
6.6mph - Average wind speed in November:
6.8mph - Average wind speed in December:
6.6mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity
Fort Collins, CO
The month with the highest relative humidity is February (67%).
The months with the lowest relative humidity are June, August and September (45%).
Average rainfall
Fort Collins, CO
- Average rainfall in January:
0.12" - Average rainfall in February:
0.31" - Average rainfall in March:
0.51" - Average rainfall in April:
0.75" - Average rainfall in May:
1.5" - Average rainfall in June:
0.83"
- Average rainfall in July:
1.38" - Average rainfall in August:
0.75" - Average rainfall in September:
0.55" - Average rainfall in October:
0.43" - Average rainfall in November:
0.35" - Average rainfall in December:
0.16"
The wettest month (with the highest rainfall) is May (1.5").
The driest month (with the least rainfall) is January (0.12").
Average rainfall days
Fort Collins, CO
- Average rainfall days in January:
1.2 days - Average rainfall days in February:
1.6 days - Average rainfall days in March:
4.2 days - Average rainfall days in April:
6.1 days - Average rainfall days in May:
12.1 days - Average rainfall days in June:
9.7 days
- Average rainfall days in July:
14.6 days - Average rainfall days in August:
10.8 days - Average rainfall days in September:
6.3 days - Average rainfall days in October:
3.6 days - Average rainfall days in November:
1.7 days - Average rainfall days in December:
1.5 days
The month with the highest number of rainy days is July (14.6 days).
The month with the least rainy days is January (1.2 days).
Average snowfall
Fort Collins, CO
- Average snowfall in January:
0.91" - Average snowfall in February:
2.56" - Average snowfall in March:
2.2" - Average snowfall in April:
3.27" - Average snowfall in May:
1.22" - Average snowfall in June:
0"
The month with the highest snowfall is April (3.27").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Fort Collins, CO
- Average snowfall days in January:
2.8 days - Average snowfall days in February:
4.3 days - Average snowfall days in March:
2.3 days - Average snowfall days in April:
3.1 days - Average snowfall days in May:
1.1 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 days - Average snowfall days in October:
2 days - Average snowfall days in November:
2.4 days - Average snowfall days in December:
3.2 days
The month with the highest number of snowfall days is February (4.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Fort Collins, 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 30min - 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:
9h and 54min - Average daylight in December:
9h and 18min
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 January:
7h and 0min - Average sunshine in February:
6h and 42min - Average sunshine in March:
8h and 54min - Average sunshine in April:
10h and 36min - Average sunshine in May:
10h and 48min - Average sunshine in June:
11h and 48min
- Average sunshine in July:
11h and 42min - Average sunshine in August:
11h and 36min - Average sunshine in September:
11h and 0min - Average sunshine in October:
7h and 18min - Average sunshine in November:
7h and 12min - Average sunshine in December:
6h and 54min
The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).
Average sunshine days
Fort Collins, CO
- Average sunshine days in January:
27.5 days - Average sunshine days in February:
23.5 days - Average sunshine days in March:
24.7 days - Average sunshine days in April:
21.5 days - Average sunshine days in May:
17.1 days - Average sunshine days in June:
18.9 days
- Average sunshine days in July:
14.9 days - Average sunshine days in August:
18.3 days - Average sunshine days in September:
21.7 days - Average sunshine days in October:
24.8 days - Average sunshine days in November:
26.1 days - Average sunshine days in December:
27.5 days
The months with the most sunshine days are January and December (27.5 days).
The month with the least sunshine days is July (14.9 days).
Average UV index
Fort Collins, CO
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Fort Collins, CO
The months with the most cloud cover are February, April and May (Cloud cover 27).
The month with the least cloud cover is September (Cloud cover 16).
Average visibility
Fort Collins, 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).
