Climate Comfort Score
44/100
Moderate
NOAA 1991–2020 normals 45°F annual avg Public-domain federal data
Winchester, ID Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 45°F
- Avg annual temp
- 44/100
- Comfort score
- 21.8"
- Annual precip
- 125d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Winchester
Winchester, Idaho averages 45°F a year and scores 44/100 on the comfort index - moderate, milder than 8% of U.S. cities.
- 45°F
- average temperature, NOAA 1991-2020 normal
- 44/100
- comfort score, milder than 8% of U.S. cities
- 21.8"
- annual precipitation · 87" snow
- 125 days
- frost-free growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
45°F (7°C)
Avg High
55°F
Avg Low
34°F
Annual Precip
21.8"
Annual Snow
86.5"
Comfort Score
44/100
Moderate
Avg Annual Temperature
45°F
30-year mean (NOAA NCEI)
Annual Precipitation
21.8"
Plus 86.5" of snow
Comfort score vs national 100-point ceiling (Winchester) 44.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Winchester area.
How Winchester compares to every U.S. city
Winchester's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
44 Top 92% higher than 8% 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 Winchester
MethodologyThe chart below traces how the U.S. land temperature anomaly has moved against the global mean since 1900. For Winchester, 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 | 37°F (3°C) | 23°F (-5°C) | 30°F (-1°C) | 1.8" | 17.9" | 27.4 | 0.0 |
| February | 39°F (4°C) | 23°F (-5°C) | 31°F (0°C) | 1.6" | 13.1" | 25.5 | 0.0 |
| March | 45°F (7°C) | 27°F (-3°C) | 36°F (2°C) | 2.3" | 15.8" | 25.5 | 0.0 |
| April | 52°F (11°C) | 32°F (0°C) | 42°F (5°C) | 2.7" | 9.1" | 18.5 | 0.0 |
| May | 60°F (16°C) | 39°F (4°C) | 49°F (10°C) | 2.8" | 1.6" | 7.2 | 0.0 |
| June | 67°F (19°C) | 43°F (6°C) | 55°F (13°C) | 2.4" | 0.3" | 0.8 | 0.1 |
| July | 78°F (26°C) | 49°F (9°C) | 64°F (18°C) | 0.8" | 0.0" | 0.1 | 2.0 |
| August | 79°F (26°C) | 49°F (9°C) | 64°F (18°C) | 0.7" | 0.0" | 0.1 | 2.3 |
| September | 70°F (21°C) | 42°F (6°C) | 56°F (13°C) | 1.1" | 0.0" | 2.2 | 0.3 |
| October | 56°F (13°C) | 35°F (1°C) | 45°F (7°C) | 1.8" | 1.1" | 12.2 | 0.0 |
| November | 43°F (6°C) | 28°F (-2°C) | 35°F (2°C) | 2.1" | 13.1" | 22.7 | 0.0 |
| December | 35°F (2°C) | 22°F (-5°C) | 29°F (-2°C) | 1.8" | 14.5" | 28.2 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 1.8"
Snow: 17.9"
14.7 days with precipitation
February 1.6"
Snow: 13.1"
13.3 days with precipitation
March 2.3"
Snow: 15.8"
15.8 days with precipitation
April 2.7"
Snow: 9.1"
16.0 days with precipitation
May 2.8"
Snow: 1.6"
14.2 days with precipitation
June 2.4"
Snow: 0.3"
11.4 days with precipitation
July 0.8"
6.3 days with precipitation
August 0.7"
5.4 days with precipitation
September 1.1"
5.8 days with precipitation
October 1.8"
Snow: 1.1"
11.0 days with precipitation
November 2.1"
Snow: 13.1"
14.5 days with precipitation
December 1.8"
Snow: 14.5"
14.8 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
September 25
50% probability date
Last Spring Freeze
May 23
50% probability date
Growing Season
125 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,552
Higher = more heating needed
Cooling Degree Days
140
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
What Winchester's climate means for you
Winchester runs 45°F a year - peaking in August, coldest in December.
- Gardeners get about 125 frost-free days, with the last spring freeze near May 23 - plan the planting calendar around it, not the regional average.
- Energy bills track 7,552 heating and 140 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: Winchester, ID
The NOAA 1991–2020 climate normals describe Winchester, Idaho as a location with an annual average temperature of 45°F, ranging from a mean daily high of 55°F to a mean daily low of 34°F. August is typically the warmest month of the year, while December is the coldest. These thirty-year averages, computed from station USC00109846, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Beyond temperature, Winchester averages 21.8 inches of precipitation annually, with 86.5 inches typically falling as snow - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 125 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 23 and the first fall freeze near September 25. Turning to energy use, 7,552 heating degree days and 140 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Winchester scores 44/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above turn that into a planning tool: expect the mildest highs and lows in the shoulder seasons, August-driven heat at the peak of summer, and December-driven cold at the depth of winter. Every number here is a thirty-year average, not a forecast, so any given year can and does run warmer, cooler, wetter, or drier than the normal.
Frequently Asked Questions
What is the average temperature in Winchester, ID? ▼
The average annual temperature in Winchester, Idaho is 45°F. The warmest month averages 79°F (26°C) and the coldest averages 22°F (-5°C).
How much rain does Winchester get? ▼
Winchester receives 21.8 inches of precipitation annually, including 86.5 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Winchester? ▼
Winchester has a climate comfort score of 44/100 (Moderate), milder than 8% of U.S. cities in the PlainClimate database.
When is the growing season in Winchester? ▼
Winchester has approximately 125 frost-free days per year, with the last spring freeze around May 23 and the first fall freeze around September 25.
How much energy does heating and cooling require in Winchester? ▼
Winchester has 7,552 heating degree days and 140 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 Winchester climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00109846 near Winchester.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00109846. 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.