Lewiston weather in July: Lewiston, Idaho: normal highs, lows, rain and records for July
Lewiston in July has a normal high of 91°F and a normal low of 61°F, a daily mean of 76°F, rising from 85°F on the 1st to 94°F by the 31st. Measurable precipitation falls on 4 days in a normal July, 0.47 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 33°C and low of 16°C, 12 mm of precipitation in July.
- NOAA stationLewiston Airport
- Station IDUSW00024149
- Location46.37°N 117.02°W
- Elevation1,436 ft (438 m)
- Population34,693
- Jan 42° 30°
- Feb 47° 32°
- Mar 55° 36°
- Apr 62° 41°
- May 72° 48°
- Jun 79° 54°
- Jul 91° 61°
- Aug 90° 60°
- Sep 80° 52°
- Oct 63° 42°
- Nov 49° 35°
- Dec 41° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Lewiston in July?
The normal high is 91°F and the normal low 61°F, for a daily mean of 75.8°F. July is 9.3°F warmer than June and 0.6°F warmer than August. July is the warmest month of the year in Lewiston and the 12th wettest. Across the month the normal high rises 9°F, from 85°F on July 1 to 94°F on July 31. From one year to the next July's mean temperature typically moves about 3.2°F either way (NOAA's standard deviation), so roughly two Julys in three average between 73°F and 79°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 21%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 85°F | 57°F | 21% | 8% |
| July 8 | 88°F | 59°F | 18% | 6% |
| July 15 | 91°F | 61°F | 15% | 5% |
| July 22 | 93°F | 62°F | 13% | 4% |
| July 31 | 94°F | 63°F | 11% | 3% |
Every day of July: normal high, low and chance of precipitation (warmest afternoon July 26, coldest night July 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| July 1 | 85°F | 57°F | 21% | 8% | 15 h 50 min |
| July 2 | 86°F | 58°F | 20% | 8% | 15 h 40 min |
| July 3 | 86°F | 58°F | 20% | 8% | 15 h 40 min |
| July 4 | 87°F | 58°F | 19% | 7% | 15 h 40 min |
| July 5 | 87°F | 59°F | 19% | 7% | 15 h 40 min |
| July 6 | 88°F | 59°F | 18% | 7% | 15 h 40 min |
| July 7 | 88°F | 59°F | 18% | 7% | 15 h 40 min |
| July 8 | 88°F | 59°F | 18% | 6% | 15 h 40 min |
| July 9 | 89°F | 60°F | 17% | 6% | 15 h 40 min |
| July 10 | 89°F | 60°F | 17% | 6% | 15 h 40 min |
| July 11 | 90°F | 60°F | 16% | 6% | 15 h 30 min |
| July 12 | 90°F | 60°F | 16% | 5% | 15 h 30 min |
| July 13 | 91°F | 61°F | 16% | 5% | 15 h 30 min |
| July 14 | 91°F | 61°F | 15% | 5% | 15 h 30 min |
| July 15 | 91°F | 61°F | 15% | 5% | 15 h 30 min |
| July 16 | 92°F | 61°F | 15% | 4% | 15 h 30 min |
| July 17 | 92°F | 62°F | 14% | 4% | 15 h 30 min |
| July 18 | 92°F | 62°F | 14% | 4% | 15 h 20 min |
| July 19 | 93°F | 62°F | 14% | 4% | 15 h 20 min |
| July 20 | 93°F | 62°F | 13% | 4% | 15 h 20 min |
| July 21 | 93°F | 62°F | 13% | 4% | 15 h 20 min |
| July 22 | 93°F | 62°F | 13% | 4% | 15 h 20 min |
| July 23 | 93°F | 63°F | 12% | 4% | 15 h 10 min |
| July 24 | 94°F | 63°F | 12% | 4% | 15 h 10 min |
| July 25 | 94°F | 63°F | 12% | 3% | 15 h 10 min |
| July 26 | 94°F | 63°F | 12% | 3% | 15 h 10 min |
| July 27 | 94°F | 63°F | 12% | 3% | 15 h |
| July 28 | 94°F | 63°F | 11% | 3% | 15 h |
| July 29 | 94°F | 63°F | 11% | 3% | 15 h |
| July 30 | 94°F | 63°F | 11% | 3% | 15 h |
| July 31 | 94°F | 63°F | 11% | 3% | 15 h |
- Normal high
- 91°FJuly average
- Normal low
- 61°FJuly average
- Precipitation
- 0.47 inmonth total
- Days with precipitation
- 40.01 inch or more
- Days at 90°F or more
- 18
- Daylight
- 15 h 50 min to 15 hJuly 1 to July 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 27
- Sunshine
- 91%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024149; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Lewiston in July?
On a given July day the chance of 0.01 inch or more is 15% on average, highest around July 1 (21%). In all, 0.47 in falls on 4 days of a normal July.
In a normal July in Lewiston, 18 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024149.
How humid and windy is Lewiston in July?
At 3 p.m. the normal temperature is 92°F with 19% relative humidity and a dew point of 43°F; at 6 a.m. it is 66°F with 50% humidity. The wind averages 5.4 mph, most often from the 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. | 66°F | 47°F | 50% | 3.6 mph | 93% |
| 9 a.m. | 76°F | 48°F | 37% | 4.2 mph | 91% |
| noon | 87°F | 46°F | 24% | 5.4 mph | 90% |
| 3 p.m. | 92°F | 43°F | 19% | 8.3 mph | 91% |
| 6 p.m. | 89°F | 42°F | 20% | 8.7 mph | 94% |
| 9 p.m. | 79°F | 42°F | 27% | 5.9 mph | 93% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024149. 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 Lewiston?
The warmest July temperature on Lewiston's official record (since 1881) is 117°F, on July 27, 1939; the coldest is 41°F, on July 7, 1895. The wettest July brought 2.60 in (1987).
The July mean against the 1991-2020 normal of 75.8°F: 2021 82.0°F (+6.3), 2022 78.2°F (+2.4), 2023 79.2°F (+3.4), 2024 81.1°F (+5.3), 2025 78.9°F (+3.1), 2026 77.3°F (+1.5). 6 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 82.0°F | +6.3°F | 0.02 in |
| 2022 | 78.2°F | +2.4°F | 0.17 in |
| 2023 | 79.2°F | +3.4°F | 0.08 in |
| 2024 | 81.1°F | +5.3°F | 0.07 in |
| 2025 | 78.9°F | +3.1°F | 0.07 in |
| 2026 | 77.3°F | +1.5°F | 0.01 in |
Source: records: ACIS, NWS threaded record LWSthr; recent months: ACIS, station USW00024149. Records and recent months use complete months only.
How does July in Lewiston compare across Idaho?
Across the 85 places PlainClimate covers in Idaho, July normal highs run from 70°F in Mullan to 99°F in Glenns Ferry; Lewiston's is 91°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.