Lewistown weather in July: Lewistown, Montana: normal highs, lows, rain and records for July
Lewistown in July has a normal high of 82°F and a normal low of 51°F, a daily mean of 66°F, rising from 76°F on the 1st to 84°F by the 31st. Measurable precipitation falls on 10 days in a normal July, 1.76 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 28°C and low of 10°C, 45 mm of precipitation in July.
- NOAA stationLewistown Municipal Airport
- Station IDUSW00024036
- Location47.05°N 109.46°W
- Elevation4,145 ft (1,263 m)
- Population6,204
- Jan 34° 13°
- Feb 35° 14°
- Mar 44° 21°
- Apr 53° 29°
- May 63° 37°
- Jun 71° 45°
- Jul 82° 51°
- Aug 81° 50°
- Sep 70° 42°
- Oct 56° 31°
- Nov 43° 21°
- Dec 35° 14°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Lewistown in July?
The normal high is 82°F and the normal low 51°F, for a daily mean of 66.1°F. July is 8.1°F warmer than June and 0.7°F warmer than August. July is the warmest month of the year in Lewistown and the 3rd wettest. Across the month the normal high rises 8°F, from 76°F on July 1 to 84°F on July 31. From one year to the next July's mean temperature typically moves about 3.6°F either way (NOAA's standard deviation), so roughly two Julys in three average between 62°F and 70°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 40%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 76°F | 48°F | 40% | 21% |
| July 8 | 79°F | 49°F | 36% | 19% |
| July 15 | 82°F | 51°F | 34% | 17% |
| July 22 | 84°F | 52°F | 31% | 15% |
| July 31 | 84°F | 52°F | 30% | 14% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 28, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 76°F | 48°F | 40% | 21% | 15 h 50 min |
| July 2 | 77°F | 48°F | 39% | 21% | 15 h 50 min |
| July 3 | 77°F | 48°F | 39% | 21% | 15 h 50 min |
| July 4 | 78°F | 49°F | 38% | 20% | 15 h 50 min |
| July 5 | 78°F | 49°F | 38% | 20% | 15 h 50 min |
| July 6 | 79°F | 49°F | 37% | 20% | 15 h 50 min |
| July 7 | 79°F | 49°F | 37% | 19% | 15 h 50 min |
| July 8 | 79°F | 49°F | 36% | 19% | 15 h 40 min |
| July 9 | 80°F | 50°F | 36% | 19% | 15 h 40 min |
| July 10 | 80°F | 50°F | 36% | 18% | 15 h 40 min |
| July 11 | 81°F | 50°F | 35% | 18% | 15 h 40 min |
| July 12 | 81°F | 50°F | 35% | 18% | 15 h 40 min |
| July 13 | 81°F | 51°F | 34% | 17% | 15 h 40 min |
| July 14 | 82°F | 51°F | 34% | 17% | 15 h 40 min |
| July 15 | 82°F | 51°F | 34% | 17% | 15 h 30 min |
| July 16 | 82°F | 51°F | 33% | 16% | 15 h 30 min |
| July 17 | 83°F | 51°F | 33% | 16% | 15 h 30 min |
| July 18 | 83°F | 51°F | 33% | 16% | 15 h 30 min |
| July 19 | 83°F | 52°F | 32% | 16% | 15 h 30 min |
| July 20 | 83°F | 52°F | 32% | 15% | 15 h 20 min |
| July 21 | 84°F | 52°F | 32% | 15% | 15 h 20 min |
| July 22 | 84°F | 52°F | 31% | 15% | 15 h 20 min |
| July 23 | 84°F | 52°F | 31% | 15% | 15 h 20 min |
| July 24 | 84°F | 52°F | 31% | 14% | 15 h 20 min |
| July 25 | 84°F | 52°F | 31% | 14% | 15 h 10 min |
| July 26 | 84°F | 52°F | 30% | 14% | 15 h 10 min |
| July 27 | 84°F | 52°F | 30% | 14% | 15 h 10 min |
| July 28 | 84°F | 52°F | 30% | 14% | 15 h 10 min |
| July 29 | 84°F | 52°F | 30% | 14% | 15 h |
| July 30 | 84°F | 52°F | 30% | 14% | 15 h |
| July 31 | 84°F | 52°F | 30% | 14% | 15 h |
- Normal high
- 82°FJuly average
- Normal low
- 51°FJuly average
- Precipitation
- 1.76 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 6
- Daylight
- 15 h 50 min to 15 hJuly 1 to July 31
- Days at 70°F or more
- 28
- Days at 80°F or more
- 19
- Sunshine
- 87%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024036; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Lewistown in July?
On a given July day the chance of 0.01 inch or more is 34% on average, highest around July 1 (40%). In all, 1.76 in falls on 10 days of a normal July.
In a normal July in Lewistown, 6 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024036.
How humid and windy is Lewistown in July?
At 3 p.m. the normal temperature is 81°F with 27% relative humidity and a dew point of 44°F; at 6 a.m. it is 56°F with 68% humidity. The wind averages 7.6 mph, most often from the north-northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 56°F | 45°F | 68% | 6.1 mph | – |
| 9 a.m. | 71°F | 46°F | 41% | 6.5 mph | – |
| noon | 78°F | 44°F | 30% | 8.3 mph | – |
| 3 p.m. | 81°F | 44°F | 27% | 9.6 mph | – |
| 6 p.m. | 78°F | 45°F | 31% | 9.3 mph | – |
| 9 p.m. | 65°F | 47°F | 51% | 7.4 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024036. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for July in Lewistown?
The warmest July temperature on this station's record (since 1896) is 105°F, on July 31, 1900; the coldest is 27°F, on July 9, 1903. The wettest July brought 5.97 in (1928).
The July mean against the 1991-2020 normal of 66.1°F: 2021 72.7°F (+6.6), 2022 69.2°F (+3.1), 2023 66.7°F (+0.6), 2024 68.0°F (+1.9), 2025 65.5°F (−0.6), 2026 70.9°F (+4.8). 5 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 72.7°F | +6.6°F | 1.38 in |
| 2022 | 69.2°F | +3.1°F | 2.62 in |
| 2023 | 66.7°F | +0.6°F | 0.18 in |
| 2024 | 68.0°F | +1.9°F | 0.52 in |
| 2025 | 65.5°F | −0.6°F | 2.52 in |
| 2026 | 70.9°F | +4.8°F | 2.17 in |
Source: records: ACIS, station USW00024036; recent months: ACIS, station USW00024036. Records and recent months use complete months only.
How does July in Lewistown compare across Montana?
Across the 141 places PlainClimate covers in Montana, July normal highs run from 73°F in St. Mary to 91°F in Broadus; Lewistown's is 82°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.