Annual mean 10°C · wettest around May · prevailing wind SE
Warmest
29.3 °C
Coldest
1.4 °C
Wettest
22%
Windiest
4.9 m/s
Prevailing
SE
3.9 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Fort Collins over the whole year is 10°C. July is the hottest month, with highs of about 29°C; January is the coldest, with lows of about -6°C. Fort Collins has no sharply defined rainy season: the chance of rain on a given day runs from 8% in December, the driest month, to 19% in May, the wettest. Winds in Fort Collins are highest in April, averaging 3.9 m/s (14 km/h), and lightest in September, at 2.8 m/s (10 km/h). The prevailing wind is from the SE. The clearest skies in Fort Collins come in July, when the sky is typically 14% covered; May is the cloudiest month, at 34%.
Month by month Fort Collins climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
2°C
-6°C
-3°C
9%
26%
2.9 m/s
0
0
7
February
3°C
-5°C
-2°C
9%
27%
3.5 m/s
1
0
16
March
9°C
-1°C
3°C
13%
31%
3.7 m/s
6
0
36
April
13°C
2°C
8°C
14%
32%
3.9 m/s
25
0
56
May
18°C
8°C
14°C
19%
34%
3.4 m/s
50
6
70
June
26°C
14°C
23°C
14%
19%
3.1 m/s
66
45
42
July
29°C
17°C
27°C
11%
14%
3.0 m/s
47
71
18
August
28°C
15°C
25°C
12%
16%
3.0 m/s
60
64
27
September
24°C
11°C
21°C
12%
18%
2.8 m/s
72
35
52
October
16°C
4°C
11°C
12%
21%
3.0 m/s
41
2
65
November
9°C
-1°C
4°C
10%
21%
3.1 m/s
9
0
39
December
4°C
-4°C
-1°C
8%
20%
3.2 m/s
0
0
16
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Fort Collins weather by season
Year round, Fort Collins has days of about 2°C at their warmest in January, its coolest month, and 29°C in July, its warmest; the coolest hours of the day run from -6°C to 17°C through the year, and the average temperature over the year is 10°C around the clock. Rain is most likely around May and least likely around December. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Fort Collins weather in winterDecember to February
High 3°CLow -5°CRain 9%
Winter in Fort Collins has typical daily highs of about 3°C and lows of about -5°C, with a 9% chance of rain on a given day.
Fort Collins weather in springMarch to May
High 13°CLow 3°CRain 15%
Spring in Fort Collins has typical daily highs of about 13°C and lows of about 3°C, with a 15% chance of rain on a given day.
Fort Collins weather in summerJune to August
High 28°CLow 15°CRain 12%
Summer in Fort Collins has typical daily highs of about 28°C and lows of about 15°C, with a 12% chance of rain on a given day.
Fort Collins weather in autumnSeptember to November
High 16°CLow 5°CRain 11%
Autumn in Fort Collins has typical daily highs of about 16°C and lows of about 5°C, with a 11% chance of rain on a given day.
When is the rainy season in Fort Collins?
Fort Collins has no sharply defined rainy season: the chance of rain on a given day runs from 8% in December, the driest month, to 19% in May, the wettest.
What time of year is Fort Collins windiest?
Winds in Fort Collins are highest in April, averaging 3.9 m/s (14 km/h), and lightest in September, at 2.8 m/s (10 km/h). The prevailing wind is from the SE.
What is the average temperature in Fort Collins year round?
The average temperature in Fort Collins over the whole year is 10°C. July is the hottest month, with highs of about 29°C; January is the coldest, with lows of about -6°C.