Boulder, Colorado, United States Climate Change Severity

62
Very High
The current climate change severity in Boulder is Very High, with a 28.6% 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 Jul. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C

Boulder 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), Boulder temperature has changed by around +19.1%, and has experienced notable climate changes.

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

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
6060
0%
cloudyCloudy
5153
3.9%
rainyRainy
7147
-33.8%
snowySnowy
95
-44.4%
mistyMisty
01
100%

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

Climate Change Indicators:

Over the past 15 years, Boulder has experienced measurable shifts in key climate parameters, contributing to the current severity score of 62 (within the Very High severity category). This suggests worsening climate conditions from the previous years. Here’s a breakdown of the specific changes observed:

Severity Score

62/100

Very High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Boulder experienced significant changes:

Temperature change of

+1.5 °C

Variation in annual rainfall

+14.1 %

Change in average humidity

-10.6 %

PM2.5 levels surged by

-27.6 %

Heatwave changed by

+2.2 day(s)

Coldwave changed by

-5.3 day(s)

Wind speeds changed by

+3.4 km/h

These indicators show a dramatic increase in volatility and worsening conditions. Boulder's Very High severity status requires urgent and immediate adaptation and mitigation strategies, particularly focused on managing extreme weather events, improving air quality, and ensuring water resources are adequate for the population.

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

Boulder Weather Forecast 30 Days (August - September 2025)
Boulder, Colorado, United States

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Sat. 9, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon29°/15°
Humidity Icon44%
Wind Icon17km/h
Sun. 10, Aug.
partly cloudyPartly Cloudy
Temperature Icon24°/16°
Humidity Icon60%
Wind Icon25km/h
Mon. 11, Aug.
sunnySunny
Temperature Icon27°/12°
Humidity Icon48%
Wind Icon23km/h
Tue. 12, Aug.
sunnySunny
Temperature Icon31°/16°
Humidity Icon27%
Wind Icon23km/h
Wed. 13, Aug.
sunnySunny
Temperature Icon29°/16°
Humidity Icon31%
Wind Icon27km/h
Thu. 14, Aug.
sunnySunny
Temperature Icon31°/18°
Humidity Icon32%
Wind Icon26km/h
Fri. 15, Aug.
sunnySunny
Temperature Icon32°/19°
Humidity Icon25%
Wind Icon18km/h
Sat. 16, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon29°/17°
Humidity Icon34%
Wind Icon18km/h
Sun. 17, Aug.
partly cloudyPartly Cloudy
Temperature Icon29°/17°
Humidity Icon35%
Wind Icon19km/h
Mon. 18, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon30°/18°
Humidity Icon29%
Wind Icon29km/h
Tue. 19, Aug.
sunnySunny
Temperature Icon32°/18°
Humidity Icon28%
Wind Icon14km/h
Wed. 20, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon32°/18°
Humidity Icon30%
Wind Icon21km/h
Thu. 21, Aug.
sunnySunny
Temperature Icon31°/18°
Humidity Icon30%
Wind Icon22km/h
Fri. 22, Aug.
sunnySunny
Temperature Icon30°/18°
Humidity Icon30%
Wind Icon21km/h
Sat. 23, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon27°/15°
Humidity Icon44%
Wind Icon15km/h
Sun. 24, Aug.
patchy rain possiblePatchy rain possible
Temperature Icon26°/14°
Humidity Icon44%
Wind Icon15km/h
Mon. 25, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon26°/14°
Humidity Icon44%
Wind Icon14km/h
Tue. 26, Aug.
moderate rain at timesModerate rain at times
Temperature Icon26°/15°
Humidity Icon45%
Wind Icon14km/h
Wed. 27, Aug.
patchy rain possiblePatchy rain possible
Temperature Icon27°/15°
Humidity Icon43%
Wind Icon15km/h
Thu. 28, Aug.
moderate rain at timesModerate rain at times
Temperature Icon26°/15°
Humidity Icon46%
Wind Icon16km/h
Fri. 29, Aug.
patchy rain possiblePatchy rain possible
Temperature Icon26°/14°
Humidity Icon46%
Wind Icon15km/h
Sat. 30, Aug.
moderate rain at timesModerate rain at times
Temperature Icon27°/14°
Humidity Icon41%
Wind Icon14km/h
Sun. 31, Aug.
moderate rain at timesModerate rain at times
Temperature Icon27°/14°
Humidity Icon42%
Wind Icon15km/h
Mon. 1, Sep.
patchy rain possiblePatchy rain possible
Temperature Icon27°/14°
Humidity Icon41%
Wind Icon15km/h
Tue. 2, Sep.
patchy rain possiblePatchy rain possible
Temperature Icon27°/15°
Humidity Icon38%
Wind Icon14km/h
Wed. 3, Sep.
moderate rain at timesModerate rain at times
Temperature Icon26°/14°
Humidity Icon40%
Wind Icon14km/h
Thu. 4, Sep.
patchy rain possiblePatchy rain possible
Temperature Icon26°/13°
Humidity Icon40%
Wind Icon16km/h
Fri. 5, Sep.
heavy rain at timesHeavy rain at times
Temperature Icon26°/13°
Humidity Icon41%
Wind Icon15km/h
Sat. 6, Sep.
moderate rain at timesModerate rain at times
Temperature Icon26°/13°
Humidity Icon42%
Wind Icon15km/h
Sun. 7, Sep.
heavy rain at timesHeavy rain at times
Temperature Icon25°/13°
Humidity Icon43%
Wind Icon15km/h
Mon. 8, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon25°/12°
Humidity Icon45%
Wind Icon15km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onFri. 15, Aug.

32.3°C

Low will be onMon. 8, Sep.

11.5°C

HumidityHumidity

High will be onSun. 10, Aug.

60%

Low will be onFri. 15, Aug.

25%

Wind SpeedWind Speed

High will be onMon. 18, Aug.

29.2km/h

Low will be onTue. 26, Aug.

13.7km/h

PrecipitationPrecipitation

High will be onSat. 9, Aug.

3.2mm

Low will be onThu. 21, Aug.

0.02mm

Ultraviolet IndexUV

High will be onWed. 13, Aug.

6

Low will be onMon. 25, Aug.

4

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