Climate Comfort Score
54/100
Moderate
NOAA 1991–2020 normals 53°F annual avg Public-domain federal data
Boise Air Terminal, ID Climate
Pulled from NOAA NCEI 1991–2020 normals →: average temperature, precipitation, and comfort score
- 53°F
- Avg annual temp
- 54/100
- Comfort score
- 11.5"
- Annual precip
- 180d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Boise Air Terminal
Boise Air Terminal, Idaho averages 53°F a year and scores 54/100 on the comfort index - moderate, milder than 27% of U.S. cities.
- 53°F
- average temperature, NOAA 1991-2020 normal
- 54/100
- comfort score, milder than 27% of U.S. cities
- 11.5"
- annual precipitation · 18" snow
- 180 days
- growing season, frost-free days
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
53°F (12°C)
Avg High
64°F
Avg Low
42°F
Annual Precip
11.5"
Annual Snow
17.6"
Comfort Score
54/100
Moderate
Avg Annual Temperature
53°F
30-year mean (NOAA NCEI)
Annual Precipitation
11.5"
Plus 17.6" of snow
Comfort score vs national 100-point ceiling (Boise Air Terminal) 54.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Boise Air Terminal area.
How Boise Air Terminal compares to every U.S. city
Boise Air Terminal's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
54 Top 73% higher than 27% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Boise Air Terminal
MethodologyThe chart below traces how the U.S. land temperature anomaly has moved against the global mean since 1900. For Boise Air Terminal, the NOAA 1991-2020 normal captures average conditions across that spread - notably, the most recent decade runs warmer than the 30-year mean itself.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 39°F (4°C) | 26°F (-4°C) | 32°F (0°C) | 1.4" | 5.3" | 25.5 | 0.0 |
| February | 46°F (8°C) | 29°F (-2°C) | 38°F (3°C) | 1.0" | 3.3" | 20.1 | 0.0 |
| March | 56°F (13°C) | 35°F (2°C) | 45°F (7°C) | 1.3" | 1.2" | 11.2 | 0.0 |
| April | 62°F (17°C) | 40°F (4°C) | 51°F (11°C) | 1.2" | 0.1" | 5.2 | 0.1 |
| May | 72°F (22°C) | 48°F (9°C) | 60°F (16°C) | 1.4" | 0.0" | 0.8 | 1.4 |
| June | 81°F (27°C) | 54°F (12°C) | 68°F (20°C) | 0.8" | 0.0" | 0.0 | 6.6 |
| July | 93°F (34°C) | 62°F (17°C) | 77°F (25°C) | 0.2" | 0.0" | 0.0 | 22.1 |
| August | 91°F (33°C) | 61°F (16°C) | 76°F (24°C) | 0.2" | 0.0" | 0.0 | 19.5 |
| September | 80°F (27°C) | 53°F (11°C) | 66°F (19°C) | 0.4" | 0.0" | 0.2 | 4.8 |
| October | 65°F (18°C) | 42°F (5°C) | 53°F (12°C) | 0.8" | 0.1" | 3.7 | 0.3 |
| November | 49°F (9°C) | 32°F (0°C) | 40°F (5°C) | 1.2" | 2.0" | 16.3 | 0.0 |
| December | 39°F (4°C) | 25°F (-4°C) | 32°F (0°C) | 1.5" | 5.6" | 25.2 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 1.4"
Snow: 5.3"
11.1 days with precipitation
February 1.0"
Snow: 3.3"
9.1 days with precipitation
March 1.3"
Snow: 1.2"
10.1 days with precipitation
April 1.2"
Snow: 0.1"
9.2 days with precipitation
May 1.4"
8.4 days with precipitation
June 0.8"
5.3 days with precipitation
July 0.2"
2.3 days with precipitation
August 0.2"
2.1 days with precipitation
September 0.4"
3.9 days with precipitation
October 0.8"
Snow: 0.1"
6.0 days with precipitation
November 1.2"
Snow: 2.0"
9.7 days with precipitation
December 1.5"
Snow: 5.6"
12.0 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 21
50% probability date
Last Spring Freeze
April 24
50% probability date
Growing Season
180 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,321
Higher = more heating needed
Cooling Degree Days
1,045
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 73% | 6.8 | 43% | 37% |
| February | 62% | 8.2 | 46% | 31% |
| March | 53% | 8.7 | 50% | 23% |
| April | 47% | 8.6 | 61% | 17% |
| May | 45% | 8.0 | 64% | 13% |
| June | 36% | 7.6 | 84% | 3% |
| July | 30% | 7.2 | 89% | 2% |
| August | 33% | 7.0 | 86% | 3% |
| September | 41% | 7.0 | 78% | 8% |
| October | 58% | 6.7 | 61% | 22% |
| November | 72% | 7.0 | 48% | 35% |
| December | 76% | 6.6 | 40% | 42% |
What Boise Air Terminal's climate means for you
Boise Air Terminal runs 53°F a year - peaking in July, coldest in December.
- Gardeners get about 180 frost-free days, with the last spring freeze near April 24 - plan the planting calendar around it, not the regional average.
- Energy bills track 5,321 heating and 1,045 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Boise Air Terminal, ID
Boise Air Terminal, Idaho runs an annual average of 53°F, ranging from a mean daily high of 64°F to a mean daily low of 42°F, per NOAA's 1991–2020 climate normals. July is typically the warmest month of the year, while December is the coldest. Drawn from station USW00024131, these thirty-year averages smooth out year-to-year swings into a baseline for what a typical month looks like here.
Beyond temperature, Boise Air Terminal averages 11.5 inches of precipitation annually, with 17.6 inches typically falling as snow - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 180 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 24 and the first fall freeze near October 21. Turning to energy use, 5,321 heating degree days and 1,045 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Boise Air Terminal scores 54/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above are the practical planning tool: mild highs and lows land in the shoulder seasons, July-driven heat peaks in summer, and December-driven cold sets in over deep winter. These are thirty-year averages, not a forecast - any single year can run warmer, wetter, drier, or cooler than the normal.
Frequently Asked Questions
What is the average temperature in Boise Air Terminal, ID? ▼
The average annual temperature in Boise Air Terminal, Idaho is 53°F. The warmest month averages 93°F (34°C) and the coldest averages 25°F (-4°C).
How much rain does Boise Air Terminal get? ▼
Boise Air Terminal receives 11.5 inches of precipitation annually, including 17.6 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Boise Air Terminal? ▼
Boise Air Terminal has a climate comfort score of 54/100 (Moderate), milder than 27% of U.S. cities in the PlainClimate database.
When is the growing season in Boise Air Terminal? ▼
Boise Air Terminal has approximately 180 frost-free days per year, with the last spring freeze around April 24 and the first fall freeze around October 21.
How much energy does heating and cooling require in Boise Air Terminal? ▼
Boise Air Terminal has 5,321 heating degree days and 1,045 cooling degree days annually, a heating-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Boise Air Terminal climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USW00024131 near Boise Air Terminal.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00024131. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.