Boise weather in October: Boise, Idaho: normal highs, lows, rain and records for October
Boise in October has a normal high of 65°F and a normal low of 42°F, a daily mean of 53°F, falling from 73°F on the 1st to 57°F by the 31st. Measurable precipitation falls on 6 days in a normal October, 0.81 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 18°C and low of 5°C, 21 mm of precipitation and 0 cm of snow in October.
- 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 October?
The normal high is 65°F and the normal low 42°F, for a daily mean of 53.2°F. October is 13.1°F cooler than September and 12.9°F warmer than November. October is the 6th warmest month of the year in Boise and the 8th wettest. Across the month the normal high falls 16°F, from 73°F on October 1 to 57°F on October 31. From one year to the next October's mean temperature typically moves about 2.9°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 50°F and 56°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 26%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 73°F | 47°F | 16% | 6% |
| October 8 | 69°F | 45°F | 17% | 7% |
| October 15 | 65°F | 42°F | 19% | 8% |
| October 22 | 61°F | 39°F | 22% | 9% |
| October 31 | 57°F | 36°F | 26% | 10% |
Every day of October: normal high, low and chance of precipitation (warmest afternoon October 1, coldest night October 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| October 1 | 73°F | 47°F | 16% | 6% | 11 h 50 min |
| October 2 | 73°F | 47°F | 16% | 6% | 11 h 40 min |
| October 3 | 72°F | 47°F | 16% | 6% | 11 h 40 min |
| October 4 | 72°F | 46°F | 16% | 6% | 11 h 40 min |
| October 5 | 71°F | 46°F | 16% | 6% | 11 h 40 min |
| October 6 | 70°F | 45°F | 17% | 7% | 11 h 30 min |
| October 7 | 70°F | 45°F | 17% | 7% | 11 h 30 min |
| October 8 | 69°F | 45°F | 17% | 7% | 11 h 30 min |
| October 9 | 69°F | 44°F | 17% | 7% | 11 h 20 min |
| October 10 | 68°F | 44°F | 18% | 7% | 11 h 20 min |
| October 11 | 68°F | 43°F | 18% | 7% | 11 h 20 min |
| October 12 | 67°F | 43°F | 18% | 7% | 11 h 10 min |
| October 13 | 67°F | 43°F | 18% | 7% | 11 h 10 min |
| October 14 | 66°F | 42°F | 19% | 8% | 11 h 10 min |
| October 15 | 65°F | 42°F | 19% | 8% | 11 h 10 min |
| October 16 | 65°F | 41°F | 19% | 8% | 11 h |
| October 17 | 64°F | 41°F | 20% | 8% | 11 h |
| October 18 | 64°F | 41°F | 20% | 8% | 11 h |
| October 19 | 63°F | 40°F | 21% | 8% | 10 h 50 min |
| October 20 | 63°F | 40°F | 21% | 8% | 10 h 50 min |
| October 21 | 62°F | 39°F | 21% | 9% | 10 h 50 min |
| October 22 | 61°F | 39°F | 22% | 9% | 10 h 50 min |
| October 23 | 61°F | 39°F | 22% | 9% | 10 h 40 min |
| October 24 | 60°F | 38°F | 23% | 9% | 10 h 40 min |
| October 25 | 60°F | 38°F | 23% | 9% | 10 h 40 min |
| October 26 | 59°F | 38°F | 24% | 9% | 10 h 30 min |
| October 27 | 59°F | 37°F | 24% | 10% | 10 h 30 min |
| October 28 | 58°F | 37°F | 25% | 10% | 10 h 30 min |
| October 29 | 58°F | 37°F | 25% | 10% | 10 h 30 min |
| October 30 | 57°F | 36°F | 26% | 10% | 10 h 20 min |
| October 31 | 57°F | 36°F | 26% | 10% | 10 h 20 min |
- Normal high
- 65°FOctober average
- Normal low
- 42°FOctober average
- Precipitation
- 0.81 inmonth total
- Days with precipitation
- 60.01 inch or more
- Snowfall
- 0.1 inmonth total
- Nights at 32°F or colder
- 4
- Daylight
- 11 h 50 min to 10 h 20 minOctober 1 to October 31
- Days at 70°F or more
- 9
- Days at 80°F or more
- 3
- Sunshine
- 82%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 or snow in Boise in October?
On a given October day the chance of 0.01 inch or more is 20% on average, highest around October 31 (26%). In all, 0.81 in falls on 6 days of a normal October.
In a normal October in Boise, 4 nights fall to freezing and snowfall averages 0.1 inches.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00024131.
How humid and windy is Boise in October?
At 3 p.m. the normal temperature is 55°F with 39% relative humidity and a dew point of 31°F; at 6 a.m. it is 39°F with 70% humidity. The wind averages 6.7 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. | 39°F | 30°F | 70% | 5.9 mph | 68% |
| 9 a.m. | 42°F | 31°F | 65% | 6.1 mph | 64% |
| noon | 51°F | 31°F | 47% | 7.8 mph | 66% |
| 3 p.m. | 55°F | 31°F | 39% | 8.6 mph | 69% |
| 6 p.m. | 50°F | 31°F | 48% | 6.2 mph | 68% |
| 9 p.m. | 44°F | 31°F | 60% | 6.2 mph | 70% |
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 October in Boise?
The warmest October temperature on Boise's official record (since 1875) is 94°F, on October 1, 1992; the coldest is 11°F, on October 29, 1971. The wettest October brought 4.06 in (1883); the snowiest, 2.7 inches (1971).
The October mean against the 1991-2020 normal of 53.2°F: 2021 54.9°F (+1.6), 2022 56.8°F (+3.6), 2023 56.3°F (+3.1), 2024 56.4°F (+3.2), 2025 52.7°F (−0.5). 4 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 54.9°F | +1.6°F | 1.95 in |
| 2022 | 56.8°F | +3.6°F | 0.88 in |
| 2023 | 56.3°F | +3.1°F | 1.24 in |
| 2024 | 56.4°F | +3.2°F | 0.21 in |
| 2025 | 52.7°F | −0.5°F | 1.70 in |
Source: records: ACIS, NWS threaded record BOIthr; recent months: ACIS, station USW00024131. Records and recent months use complete months only.
How does October in Boise compare across Idaho?
Across the 85 places PlainClimate covers in Idaho, October normal highs run from 44°F in Mullan to 71°F in Glenns Ferry; Boise's is 65°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.