Climate Comfort Score
54/100
Moderate
NOAA 1991–2020 normals 49°F annual avg Public-domain federal data
West Allis, WI Climate
Average temperature, precipitation, and a comfort score, drawn from NOAA NCEI 1991–2020 normals →
- 49°F
- Avg annual temp
- 54/100
- Comfort score
- 39.4"
- Annual precip
- 179d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for West Allis
West Allis, Wisconsin averages 49°F a year and scores 54/100 on the comfort index - moderate, milder than 27% of U.S. cities.
- 49°F
- average temperature, NOAA 1991-2020 normal
- 54/100
- comfort score, milder than 27% of U.S. cities
- 39.4"
- annual precipitation · 52" snow
- 179 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
49°F (10°C)
Avg High
59°F
Avg Low
39°F
Annual Precip
39.4"
Annual Snow
52.3"
Comfort Score
54/100
Moderate
Avg Annual Temperature
49°F
30-year mean (NOAA NCEI)
Annual Precipitation
39.4"
Plus 52.3" of snow
Comfort score vs national 100-point ceiling (West Allis) 54.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the West Allis area.
How West Allis compares to every U.S. city
West Allis'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 West Allis
MethodologyThe chart below traces how the U.S. land temperature anomaly has moved against the global mean since 1900. For West Allis, 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 | 31°F (-1°C) | 15°F (-10°C) | 23°F (-5°C) | 2.2" | 13.5" | 28.6 | 0.0 |
| February | 34°F (1°C) | 17°F (-8°C) | 26°F (-4°C) | 2.1" | 13.6" | 25.8 | 0.0 |
| March | 45°F (7°C) | 27°F (-3°C) | 36°F (2°C) | 2.5" | 8.3" | 22.7 | 0.0 |
| April | 57°F (14°C) | 37°F (3°C) | 47°F (8°C) | 3.7" | 2.1" | 7.3 | 0.2 |
| May | 70°F (21°C) | 48°F (9°C) | 59°F (15°C) | 4.3" | 0.0" | 0.5 | 0.5 |
| June | 80°F (27°C) | 58°F (15°C) | 69°F (21°C) | 5.0" | 0.0" | 0.0 | 4.1 |
| July | 85°F (29°C) | 63°F (17°C) | 74°F (23°C) | 3.7" | 0.0" | 0.0 | 6.7 |
| August | 83°F (28°C) | 62°F (17°C) | 72°F (22°C) | 4.3" | 0.0" | 0.0 | 4.8 |
| September | 77°F (25°C) | 54°F (12°C) | 65°F (19°C) | 3.7" | 0.0" | 0.1 | 1.8 |
| October | 62°F (17°C) | 42°F (6°C) | 52°F (11°C) | 3.1" | 0.1" | 4.3 | 0.0 |
| November | 48°F (9°C) | 30°F (-1°C) | 39°F (4°C) | 2.3" | 1.4" | 15.8 | 0.0 |
| December | 36°F (2°C) | 21°F (-6°C) | 28°F (-2°C) | 2.3" | 13.3" | 28.1 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 2.2"
Snow: 13.5"
10.2 days with precipitation
February 2.1"
Snow: 13.6"
10.9 days with precipitation
March 2.5"
Snow: 8.3"
11.3 days with precipitation
April 3.7"
Snow: 2.1"
11.4 days with precipitation
May 4.3"
13.8 days with precipitation
June 5.0"
12.7 days with precipitation
July 3.7"
9.9 days with precipitation
August 4.3"
10.0 days with precipitation
September 3.7"
8.7 days with precipitation
October 3.1"
Snow: 0.1"
12.3 days with precipitation
November 2.3"
Snow: 1.4"
10.9 days with precipitation
December 2.3"
Snow: 13.3"
12.2 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 22
50% probability date
Last Spring Freeze
April 26
50% probability date
Growing Season
179 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,585
Higher = more heating needed
Cooling Degree Days
835
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nearby Cities
What West Allis's climate means for you
West Allis runs 49°F a year - peaking in July, coldest in January.
- Gardeners get about 179 frost-free days, with the last spring freeze near April 26 - plan the planting calendar around it, not the regional average.
- Energy bills track 6,585 heating and 835 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: West Allis, WI
In West Allis, Wisconsin, the NOAA 1991–2020 climate normals put the annual average temperature at 49°F, ranging from a mean daily high of 59°F to a mean daily low of 39°F. July is typically the warmest month of the year, while January is the coldest. As thirty-year averages computed from station USC00479046, these numbers smooth out year-to-year noise into a working baseline for a typical month.
Anyone planning to live, garden, or travel in West Allis should weigh precipitation alongside temperature: the annual average runs 39.4 inches, with 52.3 inches typically falling as snow. The frost-free season averages 179 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 26 and the first fall freeze near October 22. And on the energy front, 6,585 heating degree days and 835 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, West Allis scores 54/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Shoulder seasons bring the mildest highs and lows in the monthly tables above, summer brings July-driven heat, and winter brings January-driven cold - use that rhythm for planning. These figures are thirty-year averages rather than forecasts, so a specific year may still run warmer, cooler, wetter, or drier than what's shown.
Frequently Asked Questions
What is the average temperature in West Allis, WI? ▼
The average annual temperature in West Allis, Wisconsin is 49°F. The warmest month averages 85°F (29°C) and the coldest averages 15°F (-10°C).
How much rain does West Allis get? ▼
West Allis receives 39.4 inches of precipitation annually, including 52.3 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for West Allis? ▼
West Allis 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 West Allis? ▼
West Allis has approximately 179 frost-free days per year, with the last spring freeze around April 26 and the first fall freeze around October 22.
How much energy does heating and cooling require in West Allis? ▼
West Allis has 6,585 heating degree days and 835 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 West Allis climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00479046 near West Allis.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00479046. 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.