Chaska, Minnesota climate: Normal weather by month, frost dates and records
Chaska's normal year runs from 4°F January nights to 83°F July afternoons, with 34.1 inches of precipitation and 52 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.7°C, January lows of −16°C, July highs of 28°C, 866 mm of precipitation a year.
- NOAA stationChaska (2 mi NW)
- Station IDUSC00211468
- Location44.81°N 93.63°W
- Elevation923 ft (281 m)
- From the center1 miles
- Population30,167
On October 23, the normal high in Chaska is 54°F and the normal low 33°F, and the chance of measurable rain or snow is 30%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Chaska.
- Jan 23° 4°
- Feb 27° 7°
- Mar 40° 19°
- Apr 56° 33°
- May 68° 44°
- Jun 78° 56°
- Jul 83° 60°
- Aug 80° 58°
- Sep 73° 50°
- Oct 58° 36°
- Nov 41° 24°
- Dec 28° 12°
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 Chaska each month?
July is the warmest month, with normal highs of 83°F; January the coldest, with normal lows of 4°F. The most precipitation falls in June (5.28 in), the least in January (0.85 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 23°F | 4°F | 13.2°F | 0.85 | 7.8 | 7 | <1 | 31 | 9 h 10 min |
| February | 27°F | 7°F | 17.3°F | 0.90 | 11.4 | 6 | <1 | 28 | 10 h 20 min |
| March | 40°F | 19°F | 29.7°F | 1.66 | 8.0 | 9 | <1 | 25 | 11 h 50 min |
| April | 56°F | 33°F | 44.3°F | 3.24 | 4.0 | 12 | <1 | 13 | 13 h 30 min |
| May | 68°F | 44°F | 56.2°F | 4.41 | 0.0 | 13 | 1 | 2 | 14 h 50 min |
| June | 78°F | 56°F | 66.8°F | 5.28 | 0.0 | 13 | 2 | <1 | 15 h 30 min |
| July | 83°F | 60°F | 71.4°F | 4.10 | 0.0 | 10 | 5 | <1 | 15 h 20 min |
| August | 80°F | 58°F | 69.1°F | 4.58 | 0.0 | 11 | 2 | <1 | 14 h 10 min |
| September | 73°F | 50°F | 61.5°F | 3.26 | 0.0 | 10 | 1 | 1 | 12 h 40 min |
| October | 58°F | 36°F | 47.4°F | 2.84 | 0.3 | 10 | <1 | 10 | 11 h |
| November | 41°F | 24°F | 32.6°F | 1.65 | 3.5 | 6 | <1 | 23 | 9 h 40 min |
| December | 28°F | 12°F | 19.7°F | 1.32 | 16.6 | 9 | <1 | 30 | 8 h 50 min |
| Year (annual) | 55°F | 34°F | 44.1°F | 34.09 | 51.6 | 116 | 11 | 161 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −5°C | −16°C | −10.4°C | 22 mm | 20 cm |
| February | −3°C | −14°C | −8.2°C | 23 mm | 29 cm |
| March | 5°C | −7°C | −1.3°C | 42 mm | 20 cm |
| April | 13°C | 1°C | 6.8°C | 82 mm | 10 cm |
| May | 20°C | 7°C | 13.4°C | 112 mm | 0 cm |
| June | 26°C | 13°C | 19.3°C | 134 mm | 0 cm |
| July | 28°C | 16°C | 21.9°C | 104 mm | 0 cm |
| August | 27°C | 14°C | 20.6°C | 116 mm | 0 cm |
| September | 23°C | 10°C | 16.4°C | 83 mm | 0 cm |
| October | 15°C | 2°C | 8.6°C | 72 mm | 1 cm |
| November | 5°C | −5°C | 0.3°C | 42 mm | 9 cm |
| December | −2°C | −11°C | −6.8°C | 34 mm | 42 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00211468; 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 Chaska?
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 (10).
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 USC00211468.
When is the last frost in Chaska?
In Chaska, the last spring frost (32°F) comes after May 5 in half of years and after May 19 in one year in ten; the first autumn frost comes before October 5 in half of years and before September 22 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 51 year in 10 after May 19; 9 in 10 after April 21
- First autumn frost, half of years before
- October 51 year in 10 before September 22; 9 in 10 before October 18
NOAA puts the median frost-free season at 151 days, and the season without a hard freeze (28°F) at 174 days.
A hard freeze (28°F) comes after April 23 in half of springs and before October 16 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Chaska in zone 4b in ZIP code 55318.
Frost dates for every NOAA station in Minnesota · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00211468; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 Chaska?
In a normal year in Chaska, 11 days a year reach 90°F, 161 nights fall to 32°F or colder and 116 days bring measurable precipitation.
- Days at 90°F or more
- 11a 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
- 75high of 32°F or less
- Days with 0.01 inch of precipitation
- 116a normal year
- Days with 1 inch of snow or more
- 16a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00211468.
How sunny is Chaska?
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Chaska, 3.9 kWh per square metre a day. July is the sunniest month (82%) and December the cloudiest (62%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 72% | 1.8 |
| February | 78% | 3.0 |
| March | 69% | 3.7 |
| April | 68% | 4.7 |
| May | 69% | 5.4 |
| June | 74% | 6.0 |
| July | 82% | 6.4 |
| August | 79% | 5.4 |
| September | 76% | 4.2 |
| October | 69% | 2.7 |
| November | 67% | 1.8 |
| December | 62% | 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 Chaska need?
A normal year in Chaska brings 8,138 heating degree days, 51% more than the median U.S. place (5,373), and 557 cooling degree days, 39% 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 2,486 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,604 | 0 |
| February | 1,336 | 0 |
| March | 1,096 | 0 |
| April | 624 | 1 |
| May | 295 | 22 |
| June | 56 | 108 |
| July | 11 | 209 |
| August | 25 | 152 |
| September | 164 | 58 |
| October | 553 | 6 |
| November | 974 | 0 |
| December | 1,403 | 0 |
| Year (annual) | 8,138 | 557 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00211468. 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.
How does Chaska's climate compare?
Chaska is warmer than 81 of the other 128 places with their own NOAA record in Minnesota, and wetter than 102. Across the 7,247 U.S. stations with normals, its annual mean of 44.1°F is warmer than 16%.
In the Köppen classification computed from these normals, Chaska 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 Chaska share this climate record?
7 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.
- Waconia, MN13,831 people · 8 mi W
- Victoria, MN11,937 people · 4 mi N
- Carver, MN6,810 people · 4 mi S
- Norwood Young America, MN3,774 people · 14 mi W
- St. Bonifacius, MN2,169 people · 9 mi NW
- Cologne, MN2,097 people · 8 mi W
- Crown College, MN426 people · 7 mi NW
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 Chaska's climate
What is the coldest month in Chaska?
January, with a normal high of 23°F and a normal low of 4°F. The warmest is July (83°F by day, 60°F at night).
Does it snow in Chaska?
Yes: 52 inches in a normal year, falling on 30 days with 0.1 inch or more, the most in December (16.6 inches).
What is the rainiest month in Chaska?
June, with 5.28 in of precipitation in a normal year; the driest is January with 0.85 in.
What plant hardiness zone is Chaska in?
The USDA's 2023 map puts Chaska in zone 4b in ZIP code 55318.
How late can frost come in Chaska?
In half of years the last 32°F night comes after May 5; in one year in ten it comes after May 19. Waiting until May 19 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Minnesota climateThe statewide normals and every place in the state
- Chanhassen, MN4 miles from this station, 44.6°F a year
- Eden Prairie, MN8 miles from this station, 46.7°F a year
- Jordan, MN11 miles from this station, 44.2°F a year
- Delano, MN17 miles from this station, 44.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made