Lewiston, Idaho, United States Climate Change Severity

43
High
The current climate change severity in Lewiston is High, with a -9.5% improvement in the climate score compared to last 15 years. This suggests improved conditions, with more favorable environmental indicators and a reduction in negative impacts.
Data: Jan. to Jul. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C

Lewiston 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), Lewiston temperature has changed by around -1.6%, 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
5344
-16.9%
cloudyCloudy
4437
-15.9%
rainyRainy
8668
-20.9%
snowySnowy
89
12.5%
mistyMisty
02
100%

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

Climate Change Indicators:

Over the past 15 years, Lewiston has experienced measurable shifts in key climate parameters, contributing to the current severity score of 43 (within the High severity category). While the score remains High, certain factors have improved over time. Here’s a breakdown of the specific changes observed:

Severity Score

43/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Lewiston experienced significant changes:

Temperature change of

-0.1 °C

Variation in annual rainfall

-9.9 %

Change in average humidity

-5.2 %

PM2.5 levels surged by

-29.1 %

Heatwave changed by

-3 day(s)

Coldwave changed by

-4.3 day(s)

Wind speeds changed by

+0.1 km/h

These indicators show improvement in key parametes of climate, but Lewiston remains in the High severity category. Continuous focus on climate resilience is necessary to avoid further worsening and ensure sustainability.

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

Lewiston Weather Forecast 30 Days (August - September 2025)
Lewiston, Idaho, United States

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Sun. 3, Aug.
partly cloudyPartly Cloudy
Temperature Icon31°/16°
Humidity Icon43%
Wind Icon16km/h
Mon. 4, Aug.
overcastOvercast
Temperature Icon21°/12°
Humidity Icon72%
Wind Icon10km/h
Tue. 5, Aug.
sunnySunny
Temperature Icon31°/8°
Humidity Icon55%
Wind Icon21km/h
Wed. 6, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon31°/14°
Humidity Icon35%
Wind Icon20km/h
Thu. 7, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon25°/12°
Humidity Icon55%
Wind Icon10km/h
Fri. 8, Aug.
sunnySunny
Temperature Icon30°/14°
Humidity Icon35%
Wind Icon11km/h
Sat. 9, Aug.
sunnySunny
Temperature Icon34°/14°
Humidity Icon25%
Wind Icon17km/h
Sun. 10, Aug.
sunnySunny
Temperature Icon37°/19°
Humidity Icon26%
Wind Icon6km/h
Mon. 11, Aug.
sunnySunny
Temperature Icon39°/19°
Humidity Icon23%
Wind Icon14km/h
Tue. 12, Aug.
sunnySunny
Temperature Icon36°/17°
Humidity Icon17%
Wind Icon32km/h
Wed. 13, Aug.
sunnySunny
Temperature Icon30°/15°
Humidity Icon20%
Wind Icon26km/h
Thu. 14, Aug.
sunnySunny
Temperature Icon32°/15°
Humidity Icon29%
Wind Icon7km/h
Fri. 15, Aug.
sunnySunny
Temperature Icon37°/18°
Humidity Icon21%
Wind Icon9km/h
Sat. 16, Aug.
sunnySunny
Temperature Icon32°/17°
Humidity Icon36%
Wind Icon11km/h
Sun. 17, Aug.
patchy rain possiblePatchy rain possible
Temperature Icon33°/17°
Humidity Icon35%
Wind Icon13km/h
Mon. 18, Aug.
patchy rain possiblePatchy rain possible
Temperature Icon32°/18°
Humidity Icon35%
Wind Icon12km/h
Tue. 19, Aug.
sunnySunny
Temperature Icon32°/17°
Humidity Icon34%
Wind Icon13km/h
Wed. 20, Aug.
patchy rain possiblePatchy rain possible
Temperature Icon32°/17°
Humidity Icon36%
Wind Icon12km/h
Thu. 21, Aug.
moderate rain at timesModerate rain at times
Temperature Icon31°/16°
Humidity Icon39%
Wind Icon16km/h
Fri. 22, Aug.
heavy rain at timesHeavy rain at times
Temperature Icon29°/16°
Humidity Icon42%
Wind Icon14km/h
Sat. 23, Aug.
patchy rain possiblePatchy rain possible
Temperature Icon29°/15°
Humidity Icon40%
Wind Icon12km/h
Sun. 24, Aug.
patchy rain possiblePatchy rain possible
Temperature Icon30°/15°
Humidity Icon36%
Wind Icon12km/h
Mon. 25, Aug.
patchy rain possiblePatchy rain possible
Temperature Icon30°/15°
Humidity Icon35%
Wind Icon12km/h
Tue. 26, Aug.
patchy rain possiblePatchy rain possible
Temperature Icon31°/16°
Humidity Icon36%
Wind Icon12km/h
Wed. 27, Aug.
moderate rain at timesModerate rain at times
Temperature Icon30°/16°
Humidity Icon36%
Wind Icon14km/h
Thu. 28, Aug.
sunnySunny
Temperature Icon32°/15°
Humidity Icon35%
Wind Icon11km/h
Fri. 29, Aug.
patchy rain possiblePatchy rain possible
Temperature Icon30°/15°
Humidity Icon37%
Wind Icon16km/h
Sat. 30, Aug.
patchy rain possiblePatchy rain possible
Temperature Icon28°/15°
Humidity Icon42%
Wind Icon15km/h
Sun. 31, Aug.
patchy rain possiblePatchy rain possible
Temperature Icon27°/14°
Humidity Icon45%
Wind Icon14km/h
Mon. 1, Sep.
patchy rain possiblePatchy rain possible
Temperature Icon29°/14°
Humidity Icon44%
Wind Icon13km/h
Tue. 2, Sep.
patchy rain possiblePatchy rain possible
Temperature Icon29°/14°
Humidity Icon40%
Wind Icon14km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onMon. 11, Aug.

38.6°C

Low will be onTue. 5, Aug.

7.8°C

HumidityHumidity

High will be onMon. 4, Aug.

72%

Low will be onTue. 12, Aug.

17%

Wind SpeedWind Speed

High will be onTue. 12, Aug.

32.4km/h

Low will be onSun. 10, Aug.

5.8km/h

PrecipitationPrecipitation

High will be onWed. 6, Aug.

2.3mm

Low will be onMon. 18, Aug.

0.1mm

Ultraviolet IndexUV

High will be onSun. 10, Aug.

7

Low will be onThu. 7, Aug.

4

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