Boise weather in July: Boise, Idaho: normal highs, lows, rain and records for July
Boise in July has a normal high of 93°F and a normal low of 62°F, a daily mean of 77°F, rising from 88°F on the 1st to 95°F by the 31st. Measurable precipitation falls on 2 days in a normal July, 0.21 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 34°C and low of 17°C, 5 mm of precipitation in July.
- NOAA stationBoise Air Terminal
- Station IDUSW00024131
- Location43.57°N 116.24°W
- Elevation2,814 ft (858 m)
- From the center2 miles
- Population237,963
- Jan 39° 26°
- Feb 46° 29°
- Mar 56° 35°
- Apr 62° 40°
- May 72° 48°
- Jun 81° 54°
- Jul 93° 62°
- Aug 91° 61°
- Sep 80° 53°
- Oct 65° 42°
- Nov 49° 32°
- Dec 39° 25°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Boise in July?
The normal high is 93°F and the normal low 62°F, for a daily mean of 77.3°F. July is 9.5°F warmer than June and 1.5°F warmer than August. July is the warmest month of the year in Boise and the 11th wettest. Across the month the normal high rises 7°F, from 88°F on July 1 to 95°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 74°F and 81°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 11%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| July 1 | 88°F | 58°F | 11% | 5% |
| July 8 | 91°F | 60°F | 9% | 3% |
| July 15 | 93°F | 62°F | 8% | 2% |
| July 22 | 95°F | 64°F | 8% | 2% |
| July 31 | 95°F | 64°F | 7% | 2% |
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 | 88°F | 58°F | 11% | 5% | 15 h 20 min |
| July 2 | 88°F | 58°F | 11% | 4% | 15 h 20 min |
| July 3 | 89°F | 59°F | 10% | 4% | 15 h 20 min |
| July 4 | 89°F | 59°F | 10% | 4% | 15 h 20 min |
| July 5 | 90°F | 59°F | 10% | 4% | 15 h 20 min |
| July 6 | 90°F | 60°F | 10% | 4% | 15 h 20 min |
| July 7 | 91°F | 60°F | 9% | 4% | 15 h 20 min |
| July 8 | 91°F | 60°F | 9% | 3% | 15 h 20 min |
| July 9 | 91°F | 61°F | 9% | 3% | 15 h 20 min |
| July 10 | 92°F | 61°F | 9% | 3% | 15 h 20 min |
| July 11 | 92°F | 61°F | 9% | 3% | 15 h 10 min |
| July 12 | 92°F | 62°F | 8% | 3% | 15 h 10 min |
| July 13 | 93°F | 62°F | 8% | 3% | 15 h 10 min |
| July 14 | 93°F | 62°F | 8% | 3% | 15 h 10 min |
| July 15 | 93°F | 62°F | 8% | 2% | 15 h 10 min |
| July 16 | 94°F | 63°F | 8% | 2% | 15 h 10 min |
| July 17 | 94°F | 63°F | 8% | 2% | 15 h 10 min |
| July 18 | 94°F | 63°F | 8% | 2% | 15 h |
| July 19 | 94°F | 63°F | 8% | 2% | 15 h |
| July 20 | 94°F | 63°F | 8% | 2% | 15 h |
| July 21 | 95°F | 63°F | 8% | 2% | 15 h |
| July 22 | 95°F | 64°F | 8% | 2% | 15 h |
| July 23 | 95°F | 64°F | 7% | 2% | 14 h 50 min |
| July 24 | 95°F | 64°F | 7% | 2% | 14 h 50 min |
| July 25 | 95°F | 64°F | 7% | 2% | 14 h 50 min |
| July 26 | 95°F | 64°F | 7% | 2% | 14 h 50 min |
| July 27 | 95°F | 64°F | 7% | 2% | 14 h 50 min |
| July 28 | 95°F | 64°F | 7% | 2% | 14 h 40 min |
| July 29 | 95°F | 64°F | 7% | 2% | 14 h 40 min |
| July 30 | 95°F | 64°F | 7% | 2% | 14 h 40 min |
| July 31 | 95°F | 64°F | 7% | 2% | 14 h 40 min |
- Normal high
- 93°FJuly average
- Normal low
- 62°FJuly average
- Precipitation
- 0.21 inmonth total
- Days with precipitation
- 20.01 inch or more
- Days at 90°F or more
- 22
- Daylight
- 15 h 20 min to 14 h 40 minJuly 1 to July 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 29
- Sunshine
- 92%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00024131; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Boise in July?
On a given July day the chance of 0.01 inch or more is 8% on average, highest around July 1 (11%). In all, 0.21 in falls on 2 days of a normal July.
In a normal July in Boise, 22 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024131.
How humid and windy is Boise in July?
At 3 p.m. the normal temperature is 92°F with 18% relative humidity and a dew point of 42°F; at 6 a.m. it is 65°F with 46% humidity. The wind averages 7.2 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. | 65°F | 44°F | 46% | 5.2 mph | 93% |
| 9 a.m. | 76°F | 45°F | 34% | 5.9 mph | 96% |
| noon | 86°F | 45°F | 24% | 8.0 mph | 94% |
| 3 p.m. | 92°F | 42°F | 18% | 9.7 mph | 94% |
| 6 p.m. | 92°F | 40°F | 17% | 10.7 mph | 93% |
| 9 p.m. | 82°F | 43°F | 26% | 5.7 mph | 91% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024131. 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 Boise?
The warmest July temperature on Boise's official record (since 1875) is 111°F, on July 12, 1898; the coldest is 35°F, on July 5, 1986. The wettest July brought 2.01 in (1913).
The July mean against the 1991-2020 normal of 77.3°F: 2021 83.8°F (+6.5), 2022 80.7°F (+3.4), 2023 81.4°F (+4.1), 2024 82.5°F (+5.2), 2025 78.1°F (+0.8), 2026 81.0°F (+3.7). 6 of 6 ran warmer than normal.
| July | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 83.8°F | +6.5°F | 0.89 in |
| 2022 | 80.7°F | +3.4°F | 0.00 in |
| 2023 | 81.4°F | +4.1°F | 0.00 in |
| 2024 | 82.5°F | +5.2°F | 0.12 in |
| 2025 | 78.1°F | +0.8°F | 0.32 in |
| 2026 | 81.0°F | +3.7°F | 0.17 in |
Source: records: ACIS, NWS threaded record BOIthr; recent months: ACIS, station USW00024131. Records and recent months use complete months only.
How does July in Boise 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; Boise's is 93°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.