Fort Collins, Colorado, United States Climate Change Severity

48
High
The current climate change severity in Fort Collins is High, with a 0.1% worsening in the climate score compared to last 15 years. This suggests deteriorating conditions, with increasing negative impacts on weather patterns and environmental conditions.
Data: Jan. to Sep. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C (c)

Fort Collins Weather Condition Changes (Historic Vs 2025)

2025
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Historic
2025

Over the past 15 year(s), Fort Collins temperature has changed by around +9.6%, and has experienced notable climate changes.

Sunny
Cloudy
Rainy
Snowy
Misty
Data: Jan. to Sep. (Historical Vs 2025)

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
7459
-20.2%
cloudyCloudy
7178
9.8%
rainyRainy
9651
-46.8%
snowySnowy
85
-37.5%
mistyMisty
01
100%

Disclaimer: Other weather conditions not shown may affect the total day count.

Climate Change Indicators:

Over the past 15 years, Fort Collins has experienced measurable shifts in key climate parameters, contributing to the current severity score of 48 (within the High severity category). This suggests worsening climate conditions from the previous years. Here’s a breakdown of the specific changes observed:

Severity Score

48/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Fort Collins experienced significant changes:

Temperature change of

+1.0006 °C

Variation in annual rainfall

+22.9 %

Change in average humidity

-0.4 %

PM2.5 levels surged by

-26.1 %

Heatwave changed by

+4 day(s)

Coldwave changed by

-2.5 day(s)

Wind speeds changed by

+1.5 km/h

These indicators show that Fort Collins is experiencing a more volatile and extreme climate, reinforcing the need for urgent intervention to mitigate risks. As the severity score rises, focus must shift to adaptation and emergency preparedness.

Check how we calculate Climate Change Severity
Based on data from Jan. to Sep.

Fort Collins Weather Forecast 30 Days (October - November 2025)
Fort Collins, Colorado, United States

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Thu. 30, Oct.
sunnySunny
Temperature Icon12°/1°
Humidity Icon47%
Wind Icon14km/h
Fri. 31, Oct.
partly cloudyPartly Cloudy
Temperature Icon15°/0°
Humidity Icon52%
Wind Icon9km/h
Sat. 1, Nov.
sunnySunny
Temperature Icon15°/-1°
Humidity Icon42%
Wind Icon9km/h
Sun. 2, Nov.
sunnySunny
Temperature Icon21°/3°
Humidity Icon39%
Wind Icon8km/h
Mon. 3, Nov.
sunnySunny
Temperature Icon21°/8°
Humidity Icon32%
Wind Icon18km/h
Tue. 4, Nov.
sunnySunny
Temperature Icon14°/3°
Humidity Icon39%
Wind Icon13km/h
Wed. 5, Nov.
patchy rain possiblePatchy rain nearby
Temperature Icon16°/-1°
Humidity Icon47%
Wind Icon39km/h
Thu. 6, Nov.
patchy light snowPatchy light snow
Temperature Icon1°/-4°
Humidity Icon63%
Wind Icon14km/h
Fri. 7, Nov.
sunnySunny
Temperature Icon7°/-7°
Humidity Icon48%
Wind Icon8km/h
Sat. 8, Nov.
sunnySunny
Temperature Icon17°/0°
Humidity Icon40%
Wind Icon10km/h
Sun. 9, Nov.
sunnySunny
Temperature Icon18°/3°
Humidity Icon32%
Wind Icon12km/h
Mon. 10, Nov.
sunnySunny
Temperature Icon16°/5°
Humidity Icon32%
Wind Icon16km/h
Tue. 11, Nov.
sunnySunny
Temperature Icon16°/3°
Humidity Icon34%
Wind Icon11km/h
Wed. 12, Nov.
light freezing rainLight freezing rain
Temperature Icon7°/-5°
Humidity Icon55%
Wind Icon16km/h
Thu. 13, Nov.
moderate rain at timesModerate rain at times
Temperature Icon9°/-3°
Humidity Icon52%
Wind Icon16km/h
Fri. 14, Nov.
moderate rain at timesModerate rain at times
Temperature Icon9°/-3°
Humidity Icon54%
Wind Icon17km/h
Sat. 15, Nov.
moderate rain at timesModerate rain at times
Temperature Icon9°/-2°
Humidity Icon51%
Wind Icon17km/h
Sun. 16, Nov.
patchy rain possiblePatchy rain possible
Temperature Icon9°/-2°
Humidity Icon50%
Wind Icon19km/h
Mon. 17, Nov.
moderate snowModerate snow
Temperature Icon7°/-4°
Humidity Icon60%
Wind Icon19km/h
Tue. 18, Nov.
patchy rain possiblePatchy rain possible
Temperature Icon8°/-4°
Humidity Icon54%
Wind Icon19km/h
Wed. 19, Nov.
patchy rain possiblePatchy rain possible
Temperature Icon8°/-3°
Humidity Icon51%
Wind Icon16km/h
Thu. 20, Nov.
moderate rain at timesModerate rain at times
Temperature Icon8°/-3°
Humidity Icon53%
Wind Icon16km/h
Fri. 21, Nov.
patchy moderate snowPatchy moderate snow
Temperature Icon8°/-4°
Humidity Icon54%
Wind Icon15km/h
Sun. 23, Nov.
patchy rain possiblePatchy rain possible
Temperature Icon8°/-3°
Humidity Icon50%
Wind Icon17km/h
Mon. 24, Nov.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon7°/-3°
Humidity Icon50%
Wind Icon22km/h
Tue. 25, Nov.
moderate snowModerate snow
Temperature Icon6°/-5°
Humidity Icon52%
Wind Icon18km/h
Wed. 26, Nov.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon6°/-5°
Humidity Icon57%
Wind Icon16km/h
Thu. 27, Nov.
light freezing rainLight freezing rain
Temperature Icon7°/-4°
Humidity Icon49%
Wind Icon17km/h
Fri. 28, Nov.
light freezing rainLight freezing rain
Temperature Icon7°/-4°
Humidity Icon53%
Wind Icon17km/h
Sat. 29, Nov.
patchy moderate snowPatchy moderate snow
Temperature Icon5°/-4°
Humidity Icon56%
Wind Icon17km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onSun. 2, Nov.

20.6°C

Low will be onFri. 7, Nov.

-7.1°C

HumidityHumidity

High will be onThu. 6, Nov.

63%

Low will be onMon. 3, Nov.

32%

Wind SpeedWind Speed

High will be onWed. 5, Nov.

38.5km/h

Low will be onSun. 2, Nov.

7.9km/h

PrecipitationPrecipitation

High will be onMon. 24, Nov.

1.8mm

Low will be onWed. 12, Nov.

0.1mm

Ultraviolet IndexUV

High will be onMon. 3, Nov.

4

Low will be onThu. 6, Nov.

1

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