Longmont, Colorado, United States Climate Change Severity

90
Extreme
The current climate change severity in Longmont is Extreme, with a 95.1% worsening in the climate score compared to last 16 years. This suggests deteriorating conditions, with increasing negative impacts on weather patterns and environmental conditions.
Data: Jan. to Jul. (Historical Vs 2026) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C

Longmont Weather Condition Changes (Historic Vs 2026)

2026
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Historic
2026

Over the past 16 year(s), Longmont temperature has changed by around +37.6%, and has experienced notable climate changes.

Sunny
Cloudy
Rainy
Snowy
Misty
Data: Jan. to Jul. (Historical Vs 2026)

Comparison of Weather Condition (Historic Vs 2026)

HistoricDays

Year 2026Days

Change

sunnySunny
58119
105.1%
cloudyCloudy
5224
-53.8%
rainyRainy
7437
-50%
snowySnowy
72
-71.4%
mistyMisty
00
0%

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

Climate Change Indicators:

Over the past 16 years, Longmont has experienced measurable shifts in key climate parameters, contributing to the current severity score of 90 (within the Extreme severity category). This suggests worsening climate conditions from the previous years. Here’s a breakdown of the specific changes observed:

Severity Score

90/100

Extreme

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2026, Longmont experienced significant changes:

Temperature change of

+3.4 °C

Variation in annual rainfall

-37.39 %

Change in average humidity

-17.18 %

PM2.5 levels surged by

-58.03 %

Heatwave changed by

+24 Days

Coldwave changed by

-5 Days

Wind speeds changed by

+7.94 km/h

These indicators show extreme climate changes, including key climate parametes. The Extreme severity score necessitates immediate action, including large-scale mitigation efforts, climate resilience strategies, and extensive disaster preparedness.

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

Longmont Weather Forecast 30 Days (August - September 2026)
Longmont, Colorado, United States

Condition
Temperature IconTemperature
Humidity IconHumi.
Wind IconWind Speed
Mon. 17, Aug.
sunnySunny
Temperature Icon37°/13°
Humidity Icon53%
Wind Icon24.5km/h
Tue. 18, Aug.
overcastOvercast
Temperature Icon33°/17°
Humidity Icon38%
Wind Icon25.2km/h
Wed. 19, Aug.
sunnySunny
Temperature Icon34°/16°
Humidity Icon45%
Wind Icon31km/h
Thu. 20, Aug.
sunnySunny
Temperature Icon35°/15°
Humidity Icon39%
Wind Icon20.5km/h
Fri. 21, Aug.
sunnySunny
Temperature Icon37°/18°
Humidity Icon30%
Wind Icon33.5km/h
Sat. 22, Aug.
overcastOvercast
Temperature Icon36°/18°
Humidity Icon29%
Wind Icon22.3km/h
Sun. 23, Aug.
overcastOvercast
Temperature Icon35°/19°
Humidity Icon46%
Wind Icon29.2km/h
Mon. 24, Aug.
sunnySunny
Temperature Icon36°/17°
Humidity Icon45%
Wind Icon27.4km/h
Tue. 25, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon28°/15°
Humidity Icon43%
Wind Icon14.7km/h
Wed. 26, Aug.
heavy rain at timesHeavy Rain
Temperature Icon29°/16°
Humidity Icon45%
Wind Icon13.9km/h
Thu. 27, Aug.
moderate rain at timesRain
Temperature Icon30°/15°
Humidity Icon42%
Wind Icon14.4km/h
Fri. 28, Aug.
patchy rain possibleRain Possible
Temperature Icon29°/15°
Humidity Icon43%
Wind Icon14.9km/h
Sat. 29, Aug.
patchy rain possibleRain Possible
Temperature Icon30°/15°
Humidity Icon42%
Wind Icon13.6km/h
Sun. 30, Aug.
patchy rain possibleRain Possible
Temperature Icon30°/15°
Humidity Icon40%
Wind Icon13.8km/h
Mon. 31, Aug.
patchy rain possibleRain Possible
Temperature Icon29°/15°
Humidity Icon40%
Wind Icon15.2km/h
Tue. 1, Sep.
moderate rain at timesRain
Temperature Icon30°/14°
Humidity Icon38%
Wind Icon15.2km/h
Wed. 2, Sep.
patchy rain possibleRain Possible
Temperature Icon30°/15°
Humidity Icon35%
Wind Icon14.1km/h
Thu. 3, Sep.
patchy rain possibleRain Possible
Temperature Icon29°/14°
Humidity Icon37%
Wind Icon14.8km/h
Fri. 4, Sep.
moderate rain at timesRain
Temperature Icon29°/14°
Humidity Icon39%
Wind Icon15.5km/h
Sat. 5, Sep.
patchy rain possibleRain Possible
Temperature Icon28°/14°
Humidity Icon41%
Wind Icon14.3km/h
Sun. 6, Sep.
patchy rain possibleRain Possible
Temperature Icon28°/14°
Humidity Icon41%
Wind Icon15.8km/h
Mon. 7, Sep.
moderate rain at timesRain
Temperature Icon28°/13°
Humidity Icon41%
Wind Icon15.2km/h
Tue. 8, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon27°/12°
Humidity Icon41%
Wind Icon15.3km/h
Wed. 9, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon26°/12°
Humidity Icon42%
Wind Icon15.2km/h
Thu. 10, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon25°/12°
Humidity Icon45%
Wind Icon14.8km/h
Fri. 11, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon25°/12°
Humidity Icon47%
Wind Icon16.1km/h
Sat. 12, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon25°/11°
Humidity Icon47%
Wind Icon15km/h
Sun. 13, Sep.
heavy rain at timesHeavy Rain
Temperature Icon27°/11°
Humidity Icon42%
Wind Icon15.5km/h
Mon. 14, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon26°/12°
Humidity Icon41%
Wind Icon15.4km/h
Tue. 15, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon26°/12°
Humidity Icon41%
Wind Icon14.7km/h
Wed. 16, Sep.
patchy rain possibleRain Possible
Temperature Icon26°/12°
Humidity Icon40%
Wind Icon13.9km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onMon. 17, Aug.

37°C

Low will be onSat. 12, Sep.

11°C

HumidityHumidity

High will be onMon. 17, Aug.

53%

Low will be onSat. 22, Aug.

29%

Wind SpeedWind Speed

High will be onFri. 21, Aug.

33.5km/h

Low will be onSat. 29, Aug.

13.6km/h

PrecipitationPrecipitation

High will be onSat. 12, Sep.

4.7mm

Low will be onWed. 19, Aug.

0.01mm

Ultraviolet IndexUV

High will be onThu. 20, Aug.

9.6

Low will be onTue. 8, Sep.

4

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