Lewiston, Idaho, United States Climate Change Severity

57
High
The current climate change severity in Lewiston is High, with a 20.6% 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

Lewiston 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), Lewiston temperature has changed by around +8.4%, 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
5295
82.6%
cloudyCloudy
4414
-68.1%
rainyRainy
8541
-51.7%
snowySnowy
84
-50%
mistyMisty
020
100%

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

Climate Change Indicators:

Over the past 16 years, Lewiston has experienced measurable shifts in key climate parameters, contributing to the current severity score of 57 (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

57/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2026, Lewiston experienced significant changes:

Temperature change of

+0.8 °C

Variation in annual rainfall

+1.18 %

Change in average humidity

-17.37 %

PM2.5 levels surged by

-8.02 %

Heatwave changed by

-6 Days

Coldwave changed by

-8 Days

Wind speeds changed by

+3.2 km/h

These indicators show that Lewiston 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 Jul.

Lewiston Weather Forecast 30 Days (August - September 2026)
Lewiston, Idaho, United States

Condition
Temperature IconTemperature
Humidity IconHumi.
Wind IconWind Speed
Sun. 9, Aug.
sunnySunny
Temperature Icon34°/17°
Humidity Icon18%
Wind Icon18km/h
Mon. 10, Aug.
sunnySunny
Temperature Icon32°/13°
Humidity Icon21%
Wind Icon14.4km/h
Tue. 11, Aug.
sunnySunny
Temperature Icon33°/13°
Humidity Icon24%
Wind Icon16.2km/h
Wed. 12, Aug.
sunnySunny
Temperature Icon32°/14°
Humidity Icon28%
Wind Icon19.8km/h
Thu. 13, Aug.
smoky hazeSmoky haze
Temperature Icon30°/13°
Humidity Icon36%
Wind Icon20.9km/h
Fri. 14, Aug.
sunnySunny
Temperature Icon30°/13°
Humidity Icon32%
Wind Icon11.9km/h
Sat. 15, Aug.
sunnySunny
Temperature Icon33°/15°
Humidity Icon23%
Wind Icon17.3km/h
Sun. 16, Aug.
patchy rain possibleRain Possible
Temperature Icon29°/15°
Humidity Icon45%
Wind Icon10.5km/h
Mon. 17, Aug.
patchy rain possibleRain Possible
Temperature Icon29°/15°
Humidity Icon45%
Wind Icon11.1km/h
Tue. 18, Aug.
patchy rain possibleRain Possible
Temperature Icon29°/15°
Humidity Icon44%
Wind Icon11.8km/h
Wed. 19, Aug.
patchy rain possibleRain Possible
Temperature Icon29°/15°
Humidity Icon43%
Wind Icon12.4km/h
Thu. 20, Aug.
patchy rain possibleRain Possible
Temperature Icon28°/15°
Humidity Icon45%
Wind Icon11.1km/h
Fri. 21, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon27°/14°
Humidity Icon48%
Wind Icon12.1km/h
Sat. 22, Aug.
heavy rain at timesHeavy Rain
Temperature Icon26°/14°
Humidity Icon48%
Wind Icon11.1km/h
Sun. 23, Aug.
moderate rain at timesRain
Temperature Icon26°/13°
Humidity Icon48%
Wind Icon11km/h
Mon. 24, Aug.
patchy rain possibleRain Possible
Temperature Icon26°/13°
Humidity Icon43%
Wind Icon10.5km/h
Tue. 25, Aug.
patchy rain possibleRain Possible
Temperature Icon27°/13°
Humidity Icon42%
Wind Icon10.8km/h
Wed. 26, Aug.
moderate rain at timesRain
Temperature Icon28°/13°
Humidity Icon43%
Wind Icon12.1km/h
Thu. 27, Aug.
heavy rain at timesHeavy Rain
Temperature Icon27°/14°
Humidity Icon43%
Wind Icon11.4km/h
Fri. 28, Aug.
patchy rain possibleRain Possible
Temperature Icon28°/13°
Humidity Icon41%
Wind Icon10.2km/h
Sat. 29, Aug.
moderate rain at timesRain
Temperature Icon28°/13°
Humidity Icon43%
Wind Icon12.7km/h
Sun. 30, Aug.
moderate rain at timesRain
Temperature Icon26°/13°
Humidity Icon46%
Wind Icon11.2km/h
Mon. 31, Aug.
patchy rain possibleRain Possible
Temperature Icon25°/13°
Humidity Icon48%
Wind Icon11km/h
Tue. 1, Sep.
patchy rain possibleRain Possible
Temperature Icon26°/12°
Humidity Icon46%
Wind Icon11.2km/h
Wed. 2, Sep.
patchy rain possibleRain Possible
Temperature Icon27°/13°
Humidity Icon42%
Wind Icon11.1km/h
Thu. 3, Sep.
heavy rain at timesHeavy Rain
Temperature Icon26°/13°
Humidity Icon45%
Wind Icon10.8km/h
Fri. 4, Sep.
patchy rain possibleRain Possible
Temperature Icon26°/12°
Humidity Icon45%
Wind Icon9.8km/h
Sat. 5, Sep.
moderate rain at timesRain
Temperature Icon26°/12°
Humidity Icon43%
Wind Icon10.5km/h
Sun. 6, Sep.
heavy rain at timesHeavy Rain
Temperature Icon25°/12°
Humidity Icon46%
Wind Icon11.2km/h
Mon. 7, Sep.
patchy rain possibleRain Possible
Temperature Icon26°/12°
Humidity Icon45%
Wind Icon10.8km/h
Tue. 8, Sep.
heavy rain at timesHeavy Rain
Temperature Icon24°/11°
Humidity Icon48%
Wind Icon10.9km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onSun. 9, Aug.

34°C

Low will be onTue. 8, Sep.

11°C

HumidityHumidity

High will be onFri. 21, Aug.

48%

Low will be onSun. 9, Aug.

18%

Wind SpeedWind Speed

High will be onThu. 13, Aug.

20.9km/h

Low will be onFri. 4, Sep.

9.8km/h

PrecipitationPrecipitation

High will be onFri. 21, Aug.

3.1mm

Low will be onSun. 16, Aug.

0.01mm

Ultraviolet IndexUV

High will be onThu. 13, Aug.

8

Low will be onSat. 22, Aug.

4

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