Hartford Wwtp, WI Climate: Temperature & Rain by Month
Annual temperature and rainfall from NOAA NCEI's 1991–2020 normals →; comfort score computed by PlainClimate
30-year climate normals (1991-2020) from Hartford Wwtp's primary NOAA station, HARTFORD WWTP.
The climate verdict for Hartford Wwtp
Hartford Wwtp, Wisconsin has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 45°F. At 49/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 18% of scores.
- 45°F
- average temperature, NOAA 1991-2020 normal
- 49/100
- comfort score, above 18% of station-mapped location scores
- 34.1"
- annual precipitation · 36" snow
- 148 days
- frost-free days per growing season
Hartford Wwtp: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00473453 · Hartford Wwtp, WI 45°F mean · 34.1" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 45°F
- RANK-COOL #1,235
- PHOTO-FINISH ≈ Green Bay Botan…
- PRCP-MID 34.1"
- SWING-WIDE 52°F
- COMF-LOW 49/100
- LOAD-HEAT 7,781 HDD
- STN-1 USC00473453
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Green Bay Botanical, WI (+ 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.
- Hartford Wwtp (this station) 45°F
- Cold S Boardman, MI 45°F
- Hot Denmark Wwtp, WI 45°F
- Near Green Bay Botan…, WI 45°F
- Near Glendo, WY 45°F
Climate Living Index · Hartford Wwtp
Hartford Wwtp: 39/100 · grade F
Hartford Wwtp publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Hartford Wwtp, not an official NOAA rating. Rankings still use Comfort Score 49/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 34.1 in · 0.9 from 35 in | 94/100 · A |
| Normal heat + freeze calendar | 165 calendar days | 36/100 · F |
| Snowfall burden | 36.3 inches/year | 32/100 · F |
| Frost-free season | 148 days/year | 24/100 · F |
| Annual temperature balance | 44.7°F · 22.8° from 67.5°F | 19/100 · F |
Hartford Wwtp · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Hartford Wwtp is a continental Köppen climate: Dfb
Coldest-month mean 17.2°F and warmest-month mean 69.2°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
- 69.2°F
- Coldest month
- 17.2°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 Hartford Wwtp sits across the climate record
Three NOAA fields for Hartford Wwtp's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 82%
- Among 6,861 stations, Hartford Wwtp sits in the cooler third of annual means.
- Annual precipitation
- 46th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Wider than 86%
- Warmest-to-coldest month gap for Hartford Wwtp is large versus 6,861 complete station-years.
How Hartford Wwtp compares across U.S. station-mapped locations
Hartford Wwtp's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
49 18th percentile score exceeds 18% 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%). This entry sits in this band.
- 50–60: 1,329 station-mapped locations (21%). Above this entry.
- 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
Hartford Wwtp's measured station temperature trend
MethodologyAcross 65 complete annual observations from 1954 to 2025, HARTFORD WWTP warmed at a fitted rate of 0.07°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Hartford Wwtp primary station fitted change +0.07 °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 | 26°F (-3°C) | 9°F (-13°C) | 17°F (-8°C) | 1.5" | 10.0" | 30.1 | 0.0 |
| February | 30°F (-1°C) | 11°F (-11°C) | 21°F (-6°C) | 1.3" | 9.1" | 26.7 | 0.0 |
| March | 41°F (5°C) | 22°F (-6°C) | 32°F (0°C) | 1.8" | 4.0" | 25.7 | 0.0 |
| April | 54°F (12°C) | 33°F (1°C) | 44°F (7°C) | 3.4" | 1.4" | 13.4 | 0.0 |
| May | 67°F (19°C) | 44°F (7°C) | 56°F (13°C) | 3.8" | 0.3" | 2.2 | 0.3 |
| June | 77°F (25°C) | 54°F (12°C) | 66°F (19°C) | 4.8" | 0.0" | 0.0 | 2.0 |
| July | 80°F (27°C) | 58°F (15°C) | 69°F (21°C) | 3.9" | 0.0" | 0.0 | 2.8 |
| August | 79°F (26°C) | 56°F (13°C) | 67°F (20°C) | 3.7" | 0.0" | 0.0 | 1.2 |
| September | 72°F (22°C) | 48°F (9°C) | 60°F (16°C) | 3.2" | 0.0" | 0.6 | 0.4 |
| October | 59°F (15°C) | 37°F (3°C) | 48°F (9°C) | 2.9" | 0.3" | 9.3 | 0.0 |
| November | 44°F (7°C) | 26°F (-3°C) | 35°F (2°C) | 2.1" | 1.1" | 21.9 | 0.0 |
| December | 31°F (0°C) | 15°F (-9°C) | 23°F (-5°C) | 1.7" | 10.1" | 28.7 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 80°F around July 11, short of 90°F on every date, while 165 dates carry a normal low at or below freezing, the coldest 8°F near January 21.
The freezing stretch
The normal low stays at or below 32°F into April 12, then returns to freezing around October 31, covering 165 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 5, when 39% of years recorded at least a hundredth of an inch. The driest is March 10 at 27%. Summed across the calendar, that is about 115 wet dates a year.
The widest day
September 20 carries the biggest normal gap between afternoon and dawn, 24°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Hartford Wwtp.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 10.0"
9.7 days with precipitation
Snow: 9.1"
8.4 days with precipitation
Snow: 4.0"
8.2 days with precipitation
Snow: 1.4"
10.7 days with precipitation
Snow: 0.3"
12.0 days with precipitation
10.9 days with precipitation
9.0 days with precipitation
9.2 days with precipitation
8.7 days with precipitation
Snow: 0.3"
10.0 days with precipitation
Snow: 1.1"
8.5 days with precipitation
Snow: 10.1"
9.2 days with precipitation
Hartford Wwtp runs a summer-peaked wet season
36% of Hartford Wwtp'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 4.8", on a wide 52°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, July, May, taking 37% of the annual total between them.
- Driest month: February at 1.3".
- Winter share: 13% 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 Hartford Wwtp's precipitation splits across the calendar
About 115 days a year record measurable precipitation here, carrying 34.1" between them, or roughly 0.30 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 Hartford Wwtp
Hartford Wwtp averages 36.3 inches of snowfall a year, with December the snowiest month on the normals, spread across roughly 21 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: 36.3 inches of depth.
- Days recording measurable snow: about 21 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 11% 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 3
50% probability date
Last Spring Freeze
May 8
50% probability date
Growing Season
148 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,781
Higher = more heating needed
Cooling Degree Days
434
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside WI closest to Hartford 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 (45°F here).
- Arlington, SD 45°F · 0.0°F off
- Buena Vista, CO 45°F · 0.0°F off
- Canby, MN 45°F · 0.0°F off
- Evergreen, CO 45°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (34.1" here), excluding temperature-peer places.
- Algona, IA 34.1" · 0.0" off
- Chaska, MN 34.1" · 0.0" off
- Table Rock, NE 34.1" · 0.0" off
- Nebraska City, NE 34.1" · 0.0" off
Snow and freeze rhythm
When cold and snow define Hartford Wwtp
heating led · moderate · mid swing
Hartford Wwtp's energy balance leans toward cold weather: 7,781 annual heating degree days against 434 for cooling. Its 52.0°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 148 days are frost-free in a normal year. That short interval is consistent with the cold-season signal, but the measure does not predict the exact first or last freeze in any one year.
-
1. Hartford Wwtp coldest normal
January
Averaging 17°F (-8°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Hartford Wwtp typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Hartford Wwtp snow peak
December
Hartford Wwtp averages 36.3 inches of snow a year, with December the snowiest month on the normals.
Questions about Hartford Wwtp's climate
How much snow does Hartford Wwtp get? ▼
How cold does Hartford Wwtp get in winter? ▼
How much energy does heating and cooling require in Hartford Wwtp? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Hartford Wwtp's primary station: HARTFORD WWTP (USC00473453). 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 Hartford 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 Hartford 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.