Mellen, 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 Mellen's primary NOAA station, MELLEN 4 NE.
The climate verdict for Mellen
Mellen, Wisconsin has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 40°F. At 44/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 10% of scores.
- 40°F
- average temperature, NOAA 1991-2020 normal
- 44/100
- comfort score, above 10% of station-mapped location scores
- 34.7"
- annual precipitation · 103" snow
- 124 days
- frost-free growing season
Mellen: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00475286 · Mellen, WI 40°F mean · 34.7" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 40°F
- RANK-COOL #412
- PHOTO-FINISH ≈ Hurley
- PRCP-MID 34.7"
- SWING-WIDE 55°F
- COMF-LOW 44/100
- LOAD-HEAT 9,186 HDD
- STN-1 USC00475286
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Hurley, 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.
- Hot Aitkin, MN 41°F
- Mellen (this station) 40°F
- Cold Willow Rsvr, WI 40°F
- Near Hurley, WI 40°F
- Near Albion, MT 40°F
Climate Living Index · Mellen
Mellen: 25/100 · grade F
Mellen publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Mellen, not an official NOAA rating. Rankings still use Comfort Score 44/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 34.7 in · 0.3 from 35 in | 95/100 · A |
| Normal heat + freeze calendar | 187 calendar days | 21/100 · F |
| Frost-free season | 124 days/year | 9/100 · F |
| Annual temperature balance | 40.4°F · 27.1° from 67.5°F | 5/100 · F |
| Snowfall burden | 102.6 inches/year | 0/100 · F |
Mellen · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Mellen is a continental Köppen climate: Dfb
Coldest-month mean 11.4°F and warmest-month mean 66.2°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
- 66.2°F
- Coldest month
- 11.4°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 Mellen sits across the climate record
Three NOAA fields for Mellen's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 94%
- Among 6,861 stations, Mellen 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 92%
- Warmest-to-coldest month gap for Mellen is large versus 6,861 complete station-years.
How Mellen compares across U.S. station-mapped locations
Mellen's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
44 10th percentile score exceeds 10% 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
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 21°F (-6°C) | 2°F (-17°C) | 11°F (-11°C) | 1.4" | 23.8" | 31.0 | 0.0 |
| February | 26°F (-3°C) | 5°F (-15°C) | 15°F (-9°C) | 1.1" | 16.8" | 27.6 | 0.0 |
| March | 37°F (3°C) | 15°F (-9°C) | 26°F (-3°C) | 1.9" | 16.1" | 28.2 | 0.0 |
| April | 50°F (10°C) | 28°F (-2°C) | 39°F (4°C) | 3.0" | 8.7" | 22.0 | 0.0 |
| May | 64°F (18°C) | 40°F (4°C) | 52°F (11°C) | 3.8" | 0.6" | 7.8 | 0.3 |
| June | 73°F (23°C) | 50°F (10°C) | 61°F (16°C) | 4.3" | 0.0" | 0.6 | 0.7 |
| July | 77°F (25°C) | 55°F (13°C) | 66°F (19°C) | 4.8" | 0.0" | 0.0 | 0.9 |
| August | 76°F (24°C) | 54°F (12°C) | 65°F (18°C) | 3.3" | 0.0" | 0.0 | 0.6 |
| September | 68°F (20°C) | 46°F (8°C) | 57°F (14°C) | 3.6" | 0.2" | 1.9 | 0.0 |
| October | 54°F (12°C) | 34°F (1°C) | 44°F (7°C) | 3.7" | 1.5" | 14.5 | 0.0 |
| November | 38°F (3°C) | 23°F (-5°C) | 30°F (-1°C) | 1.9" | 12.8" | 25.8 | 0.0 |
| December | 26°F (-3°C) | 11°F (-12°C) | 18°F (-8°C) | 1.6" | 22.1" | 30.8 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 78°F around July 18, short of 90°F on every date, while 187 dates carry a normal low at or below freezing, the coldest 1°F near January 24.
The freezing stretch
The normal low stays at or below 32°F into April 25, then returns to freezing around October 22, covering 187 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 January 10, when 44% of years recorded at least a hundredth of an inch. The driest is March 19 at 33%. Summed across the calendar, that is about 139 wet dates a year.
The widest day
May 23 carries the biggest normal gap between afternoon and dawn, 25°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Mellen.
Where Mellen Stands Nationally
Freezing is routine here by normals standards — the normal low reaches 32°F or colder on about 187 nights a year, more than most ranked stations.
Mellen 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: 23.8"
13.7 days with precipitation
Snow: 16.8"
10.3 days with precipitation
Snow: 16.1"
10.1 days with precipitation
Snow: 8.7"
10.8 days with precipitation
Snow: 0.6"
11.7 days with precipitation
12.6 days with precipitation
11.4 days with precipitation
9.9 days with precipitation
Snow: 0.2"
11.7 days with precipitation
Snow: 1.5"
12.6 days with precipitation
Snow: 12.8"
10.8 days with precipitation
Snow: 22.1"
13.1 days with precipitation
Mellen runs a summer-peaked wet season
36% of Mellen'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 July at 4.8", on a wide 54.8°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: July, June, May, taking 37% of the annual total between them.
- Driest month: February at 1.1".
- Winter share: 12% 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 Mellen's precipitation splits across the calendar
About 139 days a year record measurable precipitation here, carrying 34.7" between them, or roughly 0.25 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 Mellen
Mellen averages 102.6 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 54 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: 102.6 inches of depth.
- Days recording measurable snow: about 54 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 30% 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
September 27
50% probability date
Last Spring Freeze
May 26
50% probability date
Growing Season
124 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
9,186
Higher = more heating needed
Cooling Degree Days
265
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside WI closest to Mellen 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 (40°F here).
- Bruno, MN 40°F · 0.0°F off
- Covington, MI 40°F · 0.0°F off
- Hinckley, MN 40°F · 0.0°F off
- McHenry, ND 40°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (34.7" here), excluding temperature-peer places.
- Bellingham, WA 34.7" · 0.0" off
- Hiawatha, KS 34.7" · 0.0" off
- Wamego, KS 34.7" · 0.0" off
- Chelsea, MI 34.7" · 0.0" off
Snow and freeze rhythm
When cold and snow define Mellen
heating led · moderate · mid swing
Mellen's energy balance leans toward cold weather: 9,186 annual heating degree days against 265 for cooling. Its 54.8°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 124 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. Mellen coldest normal
January
Averaging 11°F (-11°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Mellen typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Mellen snow peak
January
Mellen averages 102.6 inches of snow a year, with January the snowiest month on the normals.
Questions about Mellen's climate
How much snow does Mellen get? ▼
How cold does Mellen get in winter? ▼
How much energy does heating and cooling require in Mellen? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Mellen's primary station: MELLEN 4 NE (USC00475286). 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 5550700). Match rule for Mellen: 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 Mellen 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.