Germantown, WI Climate: Temperature & Rain by Month
Average temperature and precipitation from NOAA NCEI 1991–2020 normals →, with a derived climate comfort score
30-year climate normals (1991-2020) from Germantown's primary NOAA station, GERMANTOWN.
The climate verdict for Germantown
Germantown, Wisconsin has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 46°F. At 54/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 31% of scores.
- 46°F
- average temperature, NOAA 1991-2020 normal
- 54/100
- comfort score, above 31% of station-mapped location scores
- 34.4"
- annual precipitation · 54" snow
- 155 days
- growing season, frost-free days
Germantown: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00473058 · Germantown, WI 46°F mean · 34.4" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 46°F
- RANK-COOL #1,509
- PHOTO-FINISH ≈ Lander
- PRCP-MID 34.4"
- SWING-WIDE 51°F
- COMF-LOW 54/100
- LOAD-HEAT 7,449 HDD
- STN-1 USC00473058
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Lander, WY ( -0.1 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every WI station list.
- Germantown (this station) 46°F
- Cold Lander, WY 46°F
- Hot Vinton, IA 46°F
- Near Hingham Wwtp, WI 46°F
- Near Sauk City Wwtp, WI 46°F
Climate Living Index · Germantown
Germantown: 41/100 · grade D
Germantown publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Germantown, not an official NOAA rating. Rankings still use Comfort Score 54/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 34.4 in · 0.6 from 35 in | 95/100 · A |
| Normal heat + freeze calendar | 157 calendar days | 41/100 · D |
| Frost-free season | 155 days/year | 29/100 · F |
| Annual temperature balance | 45.8°F · 21.7° from 67.5°F | 22/100 · F |
| Snowfall burden | 54.3 inches/year | 19/100 · F |
Germantown · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Germantown is a continental Köppen climate: Dfb
Coldest-month mean 19.3°F and warmest-month mean 70.1°F place this station in continental, no dry season, warm summer climates (Dfb). Class Dfb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, warm summer.
- Köppen code
- Dfb
- Group
- Continental
- Warmest month
- 70.1°F
- Coldest month
- 19.3°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Germantown sits across the climate record
Three NOAA fields for Germantown's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 78%
- Among 6,861 stations, Germantown sits in the cooler third of annual means.
- Annual precipitation
- 47th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Wider than 83%
- Warmest-to-coldest month gap for Germantown is large versus 6,861 complete station-years.
How Germantown compares across U.S. station-mapped locations
Germantown's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
54 31st percentile score exceeds 31% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). This entry sits in this band.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Germantown's measured station temperature trend
MethodologyAcross 69 complete annual observations from 1945 to 2025, GERMANTOWN warmed at a fitted rate of 0.21°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Germantown primary station fitted change +0.21 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 27°F (-3°C) | 11°F (-11°C) | 19°F (-7°C) | 1.6" | 16.5" | 30.0 | 0.0 |
| February | 31°F (-1°C) | 14°F (-10°C) | 22°F (-5°C) | 1.4" | 16.0" | 27.0 | 0.0 |
| March | 42°F (5°C) | 24°F (-5°C) | 33°F (0°C) | 1.9" | 6.5" | 25.4 | 0.0 |
| April | 54°F (12°C) | 34°F (1°C) | 44°F (7°C) | 3.8" | 2.0" | 12.3 | 0.0 |
| May | 66°F (19°C) | 45°F (7°C) | 56°F (13°C) | 4.0" | 0.3" | 2.1 | 0.2 |
| June | 76°F (25°C) | 54°F (12°C) | 65°F (19°C) | 4.4" | 0.0" | 0.0 | 1.4 |
| July | 81°F (27°C) | 60°F (15°C) | 70°F (21°C) | 3.9" | 0.0" | 0.0 | 2.8 |
| August | 79°F (26°C) | 58°F (14°C) | 68°F (20°C) | 3.8" | 0.0" | 0.0 | 1.7 |
| September | 72°F (22°C) | 50°F (10°C) | 61°F (16°C) | 3.2" | 0.0" | 0.8 | 0.5 |
| October | 59°F (15°C) | 39°F (4°C) | 49°F (9°C) | 2.6" | 0.3" | 8.7 | 0.0 |
| November | 45°F (7°C) | 28°F (-2°C) | 36°F (2°C) | 2.0" | 2.4" | 20.8 | 0.0 |
| December | 33°F (1°C) | 18°F (-8°C) | 25°F (-4°C) | 1.7" | 10.3" | 28.5 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 81°F around July 14, short of 90°F on every date, while 157 dates carry a normal low at or below freezing, the coldest 10°F near January 24.
The freezing stretch
The normal low stays at or below 32°F into April 9, then returns to freezing around November 5, covering 157 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is May 9, when 43% of years recorded at least a hundredth of an inch. The driest is February 9 at 28%. Summed across the calendar, that is about 125 wet dates a year.
The widest day
September 12 carries the biggest normal gap between afternoon and dawn, 23°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Germantown.
Where Germantown Stands Nationally
Days and nights track unusually close together; the widest normal swing, about 23°F, is narrower than most stations record.
Germantown earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 16.5"
9.7 days with precipitation
Snow: 16.0"
8.0 days with precipitation
Snow: 6.5"
8.9 days with precipitation
Snow: 2.0"
11.4 days with precipitation
Snow: 0.3"
13.4 days with precipitation
11.7 days with precipitation
10.9 days with precipitation
10.8 days with precipitation
9.6 days with precipitation
Snow: 0.3"
11.5 days with precipitation
Snow: 2.4"
9.5 days with precipitation
Snow: 10.3"
9.3 days with precipitation
Germantown runs a summer-peaked wet season
35% of Germantown's yearly precipitation falls in June, July and August alone, against the 25% an evenly spread year would give those three months. The wettest month is June at 4.4", on a wide 50.8°F gap between its warmest and coldest month. Warm-season convection and, across the Southwest, the North American monsoon produce this shape: rain arrives in short heavy bursts during the hottest part of the year rather than as long cool-season soaking.
- Wettest three months: June, May, July, taking 36% of the annual total between them.
- Driest month: February at 1.4".
- Winter share: 14% falls in December, January and February.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A summer-peaked label means the June-August share reaches 35%; it describes timing across an average year, not any single season, and says nothing about how heavy an individual storm can be.
How Germantown's precipitation splits across the calendar
About 125 days a year record measurable precipitation here, carrying 34.4" between them, or roughly 0.28 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Winter brings real snow to Germantown
Germantown averages 54.3 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 25 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 54.3 inches of depth.
- Days recording measurable snow: about 25 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 16% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
October 8
50% probability date
Last Spring Freeze
May 6
50% probability date
Growing Season
155 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,449
Higher = more heating needed
Cooling Degree Days
493
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside WI closest to Germantown on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (46°F here).
- Angelica, NY 46°F · 0.0°F off
- Cass City, MI 46°F · 0.0°F off
- Flaming Gorge, UT 46°F · 0.0°F off
- Gardiner, ME 46°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (34.4" here), excluding temperature-peer places.
- Nixon, TX 34.4" · 0.0" off
- Youngstown, NY 34.4" · 0.0" off
- Frankfort, MI 34.3" · 0.0" off
- Logan, IA 34.4" · 0.0" off
Snow and freeze rhythm
When cold and snow define Germantown
heating led · moderate · mid swing
Germantown's energy balance leans toward cold weather: 7,449 annual heating degree days against 493 for cooling. Its 50.8°F seasonal range still makes the monthly rows more useful than the annual average alone.
Germantown's frost-free season lasts about 155 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Germantown coldest normal
January
Averaging 19°F (-7°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Germantown typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Germantown snow peak
January
Germantown averages 54.3 inches of snow a year, with January the snowiest month on the normals.
Questions about Germantown's climate
How much snow does Germantown get? ▼
How cold does Germantown get in winter? ▼
How much energy does heating and cooling require in Germantown? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Germantown's primary station: GERMANTOWN (USC00473058). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 5528875). Match rule for Germantown: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Germantown comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.