Berlin, Wisconsin climate: Normal weather by month, frost dates and records
Berlin's normal year runs from 8°F January nights to 81°F July afternoons, with 35.2 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.2°C, January lows of −13°C, July highs of 27°C, 894 mm of precipitation a year.
- NOAA stationBerlin Wastewater Treatment Plant
- Station IDUSC00470742
- Location43.99°N 88.94°W
- Elevation766 ft (234 m)
- Population5,607
On October 14, the normal high in Berlin is 59°F and the normal low 39°F, and the chance of measurable rain or snow is 34%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Berlin.
- Jan 25° 8°
- Feb 30° 11°
- Mar 41° 21°
- Apr 55° 33°
- May 67° 46°
- Jun 77° 56°
- Jul 81° 60°
- Aug 80° 58°
- Sep 72° 49°
- Oct 58° 38°
- Nov 43° 26°
- Dec 31° 15°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Berlin each month?
July is the warmest month, with normal highs of 81°F; January the coldest, with normal lows of 8°F. The most precipitation falls in July (4.51 in), the least in February (1.28 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 25°F | 8°F | 16.8°F | 1.39 | 7 | <1 | 30 | 9 h 10 min |
| February | 30°F | 11°F | 20.2°F | 1.28 | 7 | <1 | 27 | 10 h 30 min |
| March | 41°F | 21°F | 31.1°F | 2.83 | 7 | <1 | 26 | 11 h 50 min |
| April | 55°F | 33°F | 43.8°F | 3.57 | 11 | <1 | 15 | 13 h 20 min |
| May | 67°F | 46°F | 56.5°F | 4.22 | 13 | <1 | 1 | 14 h 40 min |
| June | 77°F | 56°F | 66.5°F | 4.20 | 11 | 1 | <1 | 15 h 30 min |
| July | 81°F | 60°F | 70.5°F | 4.51 | 9 | 4 | <1 | 15 h 10 min |
| August | 80°F | 58°F | 68.7°F | 3.64 | 9 | 2 | <1 | 14 h |
| September | 72°F | 49°F | 60.7°F | 3.49 | 10 | 1 | <1 | 12 h 40 min |
| October | 58°F | 38°F | 48.0°F | 2.74 | 11 | <1 | 9 | 11 h 10 min |
| November | 43°F | 26°F | 34.5°F | 1.99 | 8 | <1 | 22 | 9 h 40 min |
| December | 31°F | 15°F | 23.2°F | 1.35 | 8 | <1 | 29 | 9 h |
| Year (annual) | 55°F | 35°F | 45.0°F | 35.21 | 110 | 8 | 161 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −4°C | −13°C | −8.4°C | 35 mm |
| February | −1°C | −12°C | −6.6°C | 33 mm |
| March | 5°C | −6°C | −0.5°C | 72 mm |
| April | 13°C | 1°C | 6.6°C | 91 mm |
| May | 20°C | 8°C | 13.6°C | 107 mm |
| June | 25°C | 13°C | 19.2°C | 107 mm |
| July | 27°C | 15°C | 21.4°C | 115 mm |
| August | 26°C | 14°C | 20.4°C | 92 mm |
| September | 22°C | 10°C | 15.9°C | 89 mm |
| October | 15°C | 3°C | 8.9°C | 70 mm |
| November | 6°C | −3°C | 1.4°C | 51 mm |
| December | −1°C | −9°C | −4.9°C | 34 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Ripon (12 miles away), gets 38 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00470742; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Berlin?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, July has the fewest days with rain (9).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00470742.
When is the last frost in Berlin?
In Berlin, the last spring frost (32°F) comes after May 1 in half of years and after May 16 in one year in ten; the first autumn frost comes before October 8 in half of years and before September 24 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- May 11 year in 10 after May 16; 9 in 10 after April 19
- First autumn frost, half of years before
- October 81 year in 10 before September 24; 9 in 10 before October 22
NOAA puts the median frost-free season at 158 days, and the season without a hard freeze (28°F) at 181 days.
A hard freeze (28°F) comes after April 21 in half of springs and before October 20 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Berlin in zone 5a in ZIP code 54923, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Berlin's NOAA station is in zone 5a: the coldest night of a typical year reaches −16°F (15 complete years).
Frost dates for every NOAA station in Wisconsin · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00470742; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Berlin?
In a normal year in Berlin, 8 days a year reach 90°F, 161 nights fall to 32°F or colder and 110 days bring measurable precipitation.
- Days at 90°F or more
- 8a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 161a normal year
- Days that stay below freezing
- 67high of 32°F or less
- Days with 0.01 inch of precipitation
- 110a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00470742.
How sunny is Berlin?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Berlin, 3.8 kWh per square metre a day. July is the sunniest month (80%) and December the cloudiest (59%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 63% | 1.6 |
| February | 70% | 2.7 |
| March | 70% | 3.7 |
| April | 68% | 4.6 |
| May | 71% | 5.5 |
| June | 76% | 6.1 |
| July | 80% | 6.3 |
| August | 78% | 5.3 |
| September | 77% | 4.2 |
| October | 68% | 2.7 |
| November | 66% | 1.8 |
| December | 59% | 1.3 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Berlin need?
A normal year in Berlin brings 7,737 heating degree days, 44% more than the median U.S. place (5,373), and 501 cooling degree days, 45% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,428 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,492 | 0 |
| February | 1,254 | 0 |
| March | 1,052 | 1 |
| April | 636 | 1 |
| May | 287 | 23 |
| June | 58 | 102 |
| July | 14 | 186 |
| August | 26 | 139 |
| September | 173 | 46 |
| October | 531 | 4 |
| November | 917 | 0 |
| December | 1,297 | 0 |
| Year (annual) | 7,737 | 501 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00470742. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Berlin been warmer than normal lately?
2025 averaged 46.1°F, 1.1°F above the 1991-2020 normal of 45.0°F. 3 of the 3 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 47.0°F | +2.0°F | 34.41 |
| 2023 | 48.3°F | +3.3°F | 29.68 |
| 2025 | 46.1°F | +1.1°F | 24.95 |
Source: observed years: ACIS, station USC00470742. A year counts only with all twelve months complete.
How does Berlin's climate compare?
Berlin is warmer than 78 of the other 164 places with their own NOAA record in Wisconsin, and wetter than 90. Across the 7,247 U.S. stations with normals, its annual mean of 45.0°F is warmer than 19%.
In the Köppen classification computed from these normals, Berlin is Dfb: continental, no dry season, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Berlin share this climate record?
6 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Redgranite, WI2,123 people · 10 mi NW
- Lohrville, WI432 people · 10 mi W
- Poy Sippi, WI396 people · 11 mi N
- Eureka, WI255 people · 5 mi E
- Pine River, WI115 people · 13 mi NW
- Tustin, WI105 people · 13 mi N
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Berlin's climate
What is the coldest month in Berlin?
January, with a normal high of 25°F and a normal low of 8°F. The warmest is July (81°F by day, 60°F at night).
Does it snow in Berlin?
Yes. NOAA publishes no 1991-2020 snowfall normal for Berlin's NOAA station; the nearest record that keeps one, Ripon (12 miles away), records 38 inches of snow in a normal year.
What is the rainiest month in Berlin?
July, with 4.51 in of precipitation in a normal year; the driest is February with 1.28 in.
What plant hardiness zone is Berlin in?
The USDA's 2023 map puts Berlin in zone 5a in ZIP code 54923, the nearest ZIP area. By the same method at Berlin's NOAA station, the coldest night of a typical year reaches −16°F (15 years, 1991-2020): zone 5a.
How late can frost come in Berlin?
In half of years the last 32°F night comes after May 1; in one year in ten it comes after May 16. Waiting until May 16 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wisconsin climateThe statewide normals and every place in the state
- Ripon, WI12 miles from this station, 45.1°F a year
- Oshkosh, WI19 miles from this station, 46.3°F a year
- Markesan, WI20 miles from this station, 45.1°F a year
- Montello, WI24 miles from this station, 45.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made