Lewistown Weather in July
Average highs run from 76°F on July 1 to 84°F on July 31, and lows from 48°F to 52°F. Normal precipitation for the month is 1.76 in over about 10 wet days.
July day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
July at a glance
- Average high
- 82°F
- Average low
- 51°F
- Precipitation
- 1.76 in
- Record high
- 105°FJul 31, 1900
- Record low
- 27°FJul 9, 1903
- Chance of a freeze
- 0%
- Days of 90°F or more
- 5.7
- Daylight
- 15 h 50 min to 14 h 56 min
- Cloud cover
- 45%
- Humidity
- 52%
- Dew point
- 46°F
- Wind
- 8.5 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Jul 1 | 76°F | 48°F | 96°F 2021 | 34°F 1901 | 40% | 0% |
| Jul 2 | 77°F | 48°F | 102°F 1908 | 34°F 1915 | 39% | 0% |
| Jul 3 | 77°F | 48°F | 97°F 1936 | 34°F 1972 | 39% | 0% |
| Jul 4 | 78°F | 49°F | 98°F 1937 | 32°F 1915 | 38% | 0% |
| Jul 5 | 78°F | 49°F | 99°F 1936 | 35°F 1901 | 38% | 0% |
| Jul 6 | 79°F | 49°F | 98°F 2007 | 37°F 1902 | 37% | 0% |
| Jul 7 | 79°F | 49°F | 94°F 1900 | 36°F 1952 | 37% | 0% |
| Jul 8 | 79°F | 49°F | 99°F 1930 | 35°F 1903 | 36% | 0% |
| Jul 9 | 80°F | 50°F | 97°F 2017 | 27°F 1903 | 36% | 0% |
| Jul 10 | 80°F | 50°F | 100°F 1939 | 39°F 1902 | 36% | 0% |
| Jul 11 | 81°F | 50°F | 98°F 1925 | 33°F 1951 | 35% | 0% |
| Jul 12 | 81°F | 50°F | 101°F 2026 | 36°F 2008 | 35% | 0% |
| Jul 13 | 81°F | 51°F | 101°F 2002 | 37°F 1909 | 34% | 0% |
| Jul 14 | 82°F | 51°F | 101°F 2002 | 35°F 1913 | 34% | 0% |
| Jul 15 | 82°F | 51°F | 98°F 1930 | 36°F 1913 | 34% | 0% |
| Jul 16 | 82°F | 51°F | 98°F 1919 | 34°F 1999 | 33% | 0% |
| Jul 17 | 83°F | 51°F | 101°F 2022 | 38°F 1982 | 33% | 0% |
| Jul 18 | 83°F | 51°F | 100°F 1955 | 36°F 1900 | 33% | 0% |
| Jul 19 | 83°F | 52°F | 99°F 1960 | 35°F 1897 | 32% | 0% |
| Jul 20 | 83°F | 52°F | 96°F 1921 | 36°F 1900 | 32% | 0% |
| Jul 21 | 84°F | 52°F | 101°F 1931 | 33°F 1926 | 32% | 0% |
| Jul 22 | 84°F | 52°F | 99°F 1936 | 37°F 1914 | 31% | 0% |
| Jul 23 | 84°F | 52°F | 104°F 1931 | 35°F 1896 | 31% | 0% |
| Jul 24 | 84°F | 52°F | 101°F 1929 | 33°F 1896 | 31% | 0% |
| Jul 25 | 84°F | 52°F | 101°F 1933 | 38°F 1948 | 31% | 0% |
| Jul 26 | 84°F | 52°F | 97°F 1933 | 38°F 2005 | 30% | 0% |
| Jul 27 | 84°F | 52°F | 100°F 1947 | 38°F 1913 | 30% | 0% |
| Jul 28 | 84°F | 52°F | 99°F 1914 | 35°F 1929 | 30% | 0% |
| Jul 29 | 84°F | 52°F | 98°F 1929 | 35°F 1904 | 30% | 0% |
| Jul 30 | 84°F | 52°F | 103°F 1908 | 32°F 1904 | 30% | 0% |
| Jul 31 | 84°F | 52°F | 105°F 1900 | 35°F 1968 | 30% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MDT).
- July 1
- sunrise 5:27 AM, sunset 9:17 PM
- July 31
- sunrise 5:56 AM, sunset 8:52 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00024036 (Lewistown Muni AP), public domain. Records: NOAA GHCN-Daily, station USW00024036, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.