South Milwaukee Wwtp, WI Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from South Milwaukee Wwtp's primary NOAA station, SOUTH MILWAUKEE WWTP.
The climate verdict for South Milwaukee Wwtp
South Milwaukee Wwtp, Wisconsin has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 48°F. Its climate comfort score of 68/100 (good) lands mid-pack nationally, exceeding 56% of station-mapped location scores.
- 48°F
- average temperature, NOAA 1991-2020 normal
- 68/100
- comfort score, above 56% of station-mapped location scores
- 36.6"
- yearly precipitation total
- 187 days
- frost-free growing season
South Milwaukee Wwtp: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00477964 · South Milwaukee Wwtp, WI 48°F mean · 36.6" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 48°F
- RANK-COOL #2,264
- PHOTO-FINISH ≈ Pontiac Oakland…
- PRCP-MID 36.6"
- SWING-WIDE 49°F
- COMF-MID 68/100
- LOAD-HEAT 6,679 HDD
- STN-1 USC00477964
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Pontiac Oakland County, MI (+ 0 °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.
- Hot Sidney, NE 49°F
- South Milwaukee… (this station) 48°F
- Cold Angola, IN 48°F
- Near Pontiac Oakland…, MI 48°F
- Near Racine Batten, WI 48°F
Climate Living Index · South Milwaukee Wwtp
South Milwaukee Wwtp: 56/100 · grade C
South Milwaukee Wwtp publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for South Milwaukee Wwtp, not an official NOAA rating. Rankings still use Comfort Score 68/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 36.6 in · 1.6 from 35 in | 93/100 · A |
| Normal heat + freeze calendar | 135 calendar days | 56/100 · C |
| Frost-free season | 187 days/year | 55/100 · C |
| Annual temperature balance | 48.4°F · 19.1° from 67.5°F | 33/100 · F |
South Milwaukee Wwtp · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
South Milwaukee Wwtp is a continental Köppen climate: Dfa
Coldest-month mean 23.2°F and warmest-month mean 72.6°F place this station in continental, no dry season, hot summer climates (Dfa). Class Dfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, hot summer.
- Köppen code
- Dfa
- Group
- Continental
- Warmest month
- 72.6°F
- Coldest month
- 23.2°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 South Milwaukee Wwtp sits across the climate record
Three NOAA fields for South Milwaukee Wwtp's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 33rd percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 51st percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Wider than 79%
- Warmest-to-coldest month gap for South Milwaukee Wwtp is large versus 6,861 complete station-years.
How South Milwaukee Wwtp compares across U.S. station-mapped locations
South Milwaukee Wwtp's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
68 Top 44% score exceeds 56% 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%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). This entry sits in this band.
- 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
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 30°F (-1°C) | 16°F (-9°C) | 23°F (-5°C) | 1.6" | 28.6 | 0.0 |
| February | 33°F (1°C) | 18°F (-8°C) | 26°F (-4°C) | 1.8" | 25.6 | 0.0 |
| March | 42°F (6°C) | 28°F (-2°C) | 35°F (2°C) | 2.2" | 21.1 | 0.0 |
| April | 53°F (12°C) | 37°F (3°C) | 45°F (7°C) | 4.1" | 6.7 | 0.0 |
| May | 64°F (18°C) | 47°F (8°C) | 56°F (13°C) | 4.2" | 0.1 | 0.1 |
| June | 75°F (24°C) | 57°F (14°C) | 66°F (19°C) | 4.6" | 0.0 | 1.4 |
| July | 80°F (27°C) | 65°F (18°C) | 73°F (23°C) | 3.5" | 0.0 | 3.2 |
| August | 79°F (26°C) | 64°F (18°C) | 72°F (22°C) | 3.8" | 0.0 | 2.0 |
| September | 73°F (23°C) | 56°F (13°C) | 65°F (18°C) | 3.3" | 0.0 | 0.5 |
| October | 61°F (16°C) | 44°F (7°C) | 52°F (11°C) | 3.4" | 2.5 | 0.0 |
| November | 48°F (9°C) | 33°F (0°C) | 40°F (5°C) | 2.1" | 14.4 | 0.0 |
| December | 36°F (2°C) | 22°F (-5°C) | 29°F (-2°C) | 1.9" | 25.2 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 81°F around July 19, short of 90°F on every date, while 135 dates carry a normal low at or below freezing, the coldest 15°F near January 23.
The freezing stretch
The normal low stays at or below 32°F into March 30, then returns to freezing around November 17, covering 135 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 June 1, when 44% of years recorded at least a hundredth of an inch. The driest is July 23 at 30%. Summed across the calendar, that is about 131 wet dates a year.
The widest day
June 3 carries the biggest normal gap between afternoon and dawn, 18°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for South Milwaukee Wwtp.
Where South Milwaukee Wwtp Stands Nationally
Among the steadiest day-night climates ranked: even the widest normal daily swing holds to roughly 18°F.
South Milwaukee Wwtp 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
9.8 days with precipitation
9.1 days with precipitation
10.3 days with precipitation
13.4 days with precipitation
13.5 days with precipitation
13.0 days with precipitation
8.7 days with precipitation
10.8 days with precipitation
10.4 days with precipitation
12.1 days with precipitation
9.0 days with precipitation
10.6 days with precipitation
South Milwaukee Wwtp spreads its precipitation across the year
Neither half of the year dominates here: June through August take 33% of the annual total and December through February 15%, with neither reaching the 35% that would mark a distinct wet season. South Milwaukee Wwtp has no dry season to plan around, though it does carry a wide 49.4°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: June averages 4.6" and January 1.6". The three wettest months together take 35% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
How South Milwaukee Wwtp's precipitation splits across the calendar
About 131 days a year record measurable precipitation here, carrying 36.6" 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.
Frost Dates & Growing Season
First Fall Freeze
October 26
50% probability date
Last Spring Freeze
April 22
50% probability date
Growing Season
187 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,679
Higher = more heating needed
Cooling Degree Days
661
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside WI closest to South Milwaukee Wwtp 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 (48°F here).
- Alturas, CA 48°F · 0.0°F off
- Dunkirk, NY 48°F · 0.0°F off
- Falls Village, CT 48°F · 0.0°F off
- Haverhill, MA 48°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (36.6" here), excluding temperature-peer places.
- Batavia, NY 36.6" · 0.0" off
- Rochelle, IL 36.6" · 0.0" off
- Mullan, ID 36.6" · 0.0" off
- Des Moines, IA 36.5" · 0.0" off
Data-derived climate profile
How South Milwaukee Wwtp's climate pattern fits together
heating led · moderate · mid swing
South Milwaukee Wwtp's energy balance leans toward cold weather: 6,679 annual heating degree days against 661 for cooling. Its 49.4°F seasonal range still makes the monthly rows more useful than the annual average alone.
South Milwaukee Wwtp's frost-free season lasts about 187 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and January mark the typical warm and cold ends of the calendar in South Milwaukee Wwtp's middle-range seasonal profile. The measured spread is 49.4°F. The annual average is 48°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
South Milwaukee Wwtp's 36.6 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Snowfall is not added to the interpretation because its annual value is missing. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from South Milwaukee Wwtp's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for South Milwaukee Wwtp, not an official NOAA class or a year-ahead forecast.
Questions about South Milwaukee Wwtp's climate
How much rain does South Milwaukee Wwtp get? ▼
How cold does South Milwaukee Wwtp get in winter? ▼
How much energy does heating and cooling require in South Milwaukee Wwtp? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from South Milwaukee Wwtp's primary station: SOUTH MILWAUKEE WWTP (USC00477964). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for South Milwaukee Wwtp; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for South Milwaukee Wwtp 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.