Boise, ID weather in October
In October, Boise sees highs around 65°F and lows around 42°F: cool, with some rain. There are about 6 days with rain. Good for outdoor plans.
- Normal high
- 65°F
- Normal low
- 42°F
- Wet days
- 6
- 0.8 in total
- Muggy days
- 0
- dew point 65°F+
How October changes from start to finish
| October 1 | October 31 | |
|---|---|---|
| Normal high | 73°F | 57°F |
| Normal low | 47°F | 36°F |
| Chance of a wet day | 16% | 25% |
| Sunrise / sunset | 7:42 am / 7:26 pm | 8:19 am / 6:37 pm |
| Daylight | 11.7 h | 10.3 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Mountain Time).
A typical October day
- 6 am44°Fdew point 32°F
- 9 am49°Fdew point 34°F
- Noon59°Fdew point 33°F
- 3 pm63°Fdew point 32°F
- 6 pm60°Fdew point 33°F
- 9 pm51°Fdew point 33°F
NOAA hourly normals (local standard time) from Boise Air Terminal (4 mi away); average wind 7 mph; clear or few clouds in 76% of daytime hours, mostly cloudy or overcast in 20%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F13 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow6 of 31
- Notable rainat least 0.10 in2 of 31
- Freezing nightslow 32°F or below4 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per October, counted from daily records for each year 1991-2020.
Rain and snow in October
Normal precipitation is 0.8 in; a dry October brings about 0.4 in and a wet one about 1.0 in (25th and 75th percentiles). Days with half an inch or more are rare. Normal snowfall is 0.1 in.
How October varies from year to year
- Warmest October, 1991-20202015: average high 71°F
- Coolest October2019: average high 58°F
- Wettest October2000: 2.6 in
- Driest October2003: no measurable precipitation
- Highest reading94°F (October 1, 1997)
- Lowest reading13°F (October 31, 2002)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
October compared with September and November
| September | October | November | |
|---|---|---|---|
| Normal high | 80°F | 65°F | 49°F |
| Normal low | 53°F | 42°F | 32°F |
| Wet days | 4 | 6 | 10 |
| Comfortable days | 13 | 13 | 1 |
| Daylight | 12.5 h | 11.0 h | 9.7 h |
Highs change by -15°F from September and -16°F into November.
Nearby alternatives in October
- Cooler: Sun Valley, ID93 mi · high 56°F · 5 wet days
How Boise ranks in October
- Normal high249th warmest of 378 cities; 1st of 2 in Idaho
- Wet days109th driest of 378
- Comfortable days127th most of 340
Frost in October
The first fall frost typically comes around Oct 21; in 1 year in 10 it comes before Oct 5. All frost dates for Boise.
Heating and cooling
October has 377 heating degree days and 10 cooling degree days (base 65°F), 6% of the year's total heating and cooling demand.
Questions
How cold is Boise in October?
The normal high is 65°F and the normal low is 42°F. From 1991 to 2020 the coldest October reading was 13°F (October 31, 2002).
Does it rain a lot in Boise in October?
About 6 days in October have at least 0.01 in of precipitation, and the normal total is 0.8 in. The wettest October in 1991-2020 was in 2000 (2.6 in); the driest was in 2003, with no measurable precipitation.
Does it snow in Boise in October?
Yes. Normal snowfall in October is 0.1 in.
Is October a good time to visit Boise?
October ranks 5th of 12 months on our comfort score for Boise (65 out of 100). It has about 13 comfortable days. The best month is May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates, humidity and wind by hour and cloud cover: Boise Air Terminal (USW00024131), 3.7 mi SSW of the city center, 2,814 ft (114 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Boise Air Terminal/Gowen Fd Airport (726810-24131), 3.7 mi SSW of the city center, 2,823 ft (123 ft higher than the city). Hourly observations, 1991-2020.