Skip to content
VSWeather

Lewistown, MT weather and climate

Fergus County, MT · population 6,028 · about 4,117 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Lewistown's own coordinates.

The year at a glance

Sunny days
216
clear or partly cloudy, per year
Precipitation
22 in
per year
Wet days
125
rain or snow per year
Snowfall
91 in
per year
Hot days
13
above 90 °F
Freezing nights
184
at or below 32 °F
Humidity
59%
average relative
Average temperature
43 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
20406080JanMarMayJulSepNovDaily high, Jan: 35 °FDaily high, Feb: 36 °FDaily high, Mar: 45 °FDaily high, Apr: 53 °FDaily high, May: 63 °FDaily high, Jun: 71 °FDaily high, Jul: 82 °FDaily high, Aug: 82 °FDaily high, Sep: 71 °FDaily high, Oct: 56 °FDaily high, Nov: 44 °FDaily high, Dec: 35 °FDaily low, Jan: 13 °FDaily low, Feb: 14 °FDaily low, Mar: 22 °FDaily low, Apr: 29 °FDaily low, May: 38 °FDaily low, Jun: 45 °FDaily low, Jul: 51 °FDaily low, Aug: 50 °FDaily low, Sep: 42 °FDaily low, Oct: 31 °FDaily low, Nov: 21 °FDaily low, Dec: 14 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high353645536371828271564435
Daily low131422293845515042312114

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.01.02.03.0JanMarMayJulSepNovLewistown, Jan: 1.0 inLewistown, Feb: 0.9 inLewistown, Mar: 1.3 inLewistown, Apr: 2.7 inLewistown, May: 3.5 inLewistown, Jun: 3.4 inLewistown, Jul: 1.7 inLewistown, Aug: 1.6 inLewistown, Sep: 1.6 inLewistown, Oct: 1.7 inLewistown, Nov: 1.1 inLewistown, Dec: 1.0 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Lewistown1.00.91.32.73.53.41.71.61.61.71.11.0

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovLewistown, Jan: 16 daysLewistown, Feb: 14 daysLewistown, Mar: 15 daysLewistown, Apr: 13 daysLewistown, May: 16 daysLewistown, Jun: 18 daysLewistown, Jul: 26 daysLewistown, Aug: 25 daysLewistown, Sep: 21 daysLewistown, Oct: 19 daysLewistown, Nov: 17 daysLewistown, Dec: 16 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Lewistown161415131618262521191716

Compare Lewistown with another city

Nearby cities and popular picks. Any two cities can be compared from the home page.

See weather for every covered Montana city

About this data

Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).