Rosemount, Minnesota climate: Normal weather by month, frost dates and records
Rosemount's normal year runs from 3°F January nights to 81°F July afternoons, with 34.1 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.7°C, January lows of −16°C, July highs of 27°C, 867 mm of precipitation a year.
- NOAA stationRosemount Research & Outreach Center
- Station IDUSC00217107
- Location44.72°N 93.10°W
- Elevation945 ft (288 m)
- From the center2 miles
- Population30,581
On October 14, the normal high in Rosemount is 60°F and the normal low 38°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Rosemount.
- Jan 22° 3°
- Feb 27° 7°
- Mar 40° 20°
- Apr 56° 34°
- May 68° 47°
- Jun 77° 57°
- Jul 81° 61°
- Aug 79° 58°
- Sep 72° 50°
- Oct 59° 37°
- Nov 42° 23°
- Dec 28° 11°
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 Rosemount each month?
July is the warmest month, with normal highs of 81°F; January the coldest, with normal lows of 3°F. The most precipitation falls in June (4.88 in), the least in February (0.90 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 22°F | 3°F | 12.8°F | 0.96 | – | <1 | 31 | 9 h 10 min |
| February | 27°F | 7°F | 17.0°F | 0.90 | – | <1 | 27 | 10 h 20 min |
| March | 40°F | 20°F | 30.2°F | 1.80 | – | <1 | 26 | 11 h 50 min |
| April | 56°F | 34°F | 44.7°F | 3.10 | – | <1 | 12 | 13 h 30 min |
| May | 68°F | 47°F | 57.2°F | 4.32 | – | 1 | 1 | 14 h 50 min |
| June | 77°F | 57°F | 67.2°F | 4.88 | – | 2 | <1 | 15 h 30 min |
| July | 81°F | 61°F | 71.1°F | 4.51 | – | 3 | <1 | 15 h 20 min |
| August | 79°F | 58°F | 68.7°F | 4.43 | – | 1 | <1 | 14 h 10 min |
| September | 72°F | 50°F | 61.2°F | 3.44 | – | 1 | <1 | 12 h 40 min |
| October | 59°F | 37°F | 47.7°F | 2.86 | – | <1 | 9 | 11 h |
| November | 42°F | 23°F | 32.5°F | 1.71 | – | <1 | 23 | 9 h 40 min |
| December | 28°F | 11°F | 19.2°F | 1.21 | – | <1 | 30 | 8 h 50 min |
| Year (annual) | 54°F | 34°F | 44.1°F | 34.12 | – | 8 | 159 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −5°C | −16°C | −10.7°C | 24 mm |
| February | −3°C | −14°C | −8.3°C | 23 mm |
| March | 4°C | −6°C | −1.0°C | 46 mm |
| April | 13°C | 1°C | 7.1°C | 79 mm |
| May | 20°C | 8°C | 14.0°C | 110 mm |
| June | 25°C | 14°C | 19.6°C | 124 mm |
| July | 27°C | 16°C | 21.7°C | 115 mm |
| August | 26°C | 15°C | 20.4°C | 113 mm |
| September | 22°C | 10°C | 16.2°C | 87 mm |
| October | 15°C | 3°C | 8.7°C | 73 mm |
| November | 5°C | −5°C | 0.3°C | 43 mm |
| December | −2°C | −12°C | −7.1°C | 31 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Farmington (5 miles away), gets 41 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00217107; 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 Rosemount?
Normal highs sit between 65°F and 85°F in May, June, July, August and September.
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 USC00217107.
When is the last frost in Rosemount?
In Rosemount, the last spring frost (32°F) comes after May 2 in half of years and after May 16 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 21 year in 10 after May 16; 9 in 10 after April 19
- First autumn frost, half of years before
- October 51 year in 10 before September 22; 9 in 10 before October 19
NOAA puts the median frost-free season at 155 days, and the season without a hard freeze (28°F) at 175 days.
A hard freeze (28°F) comes after April 22 in half of springs and before October 17 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Rosemount in zone 5a in ZIP code 55068. By the map's own method, the average of each year's coldest night over 1991-2020, Rosemount's NOAA station is in zone 4b: the coldest night of a typical year reaches −21°F (28 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Minnesota · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00217107; 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 Rosemount?
In a normal year in Rosemount, 8 days a year reach 90°F and 159 nights fall to 32°F or colder.
- 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
- 159a normal year
- Days that stay below freezing
- 76high of 32°F or less
The highest temperature in this station's record (since 1943) is 105°F, on July 31, 1988; the lowest is −38°F, on January 9, 1977.
The wettest calendar year on that record is 2002, with 43.60 in; the snowiest season is 1961–62, with 76.9 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00217107; records: ACIS (NOAA Regional Climate Centers), station USC00217107. Records use complete months only; a month missing more than three days is left out.
How sunny is Rosemount?
Over a year 73% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Rosemount, 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 Rosemount need?
A normal year in Rosemount brings 8,121 heating degree days, 51% more than the median U.S. place (5,373), and 551 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 2,515 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,620 | 0 |
| February | 1,345 | 0 |
| March | 1,081 | 0 |
| April | 609 | 2 |
| May | 272 | 30 |
| June | 54 | 120 |
| July | 12 | 201 |
| August | 26 | 141 |
| September | 167 | 52 |
| October | 540 | 5 |
| November | 977 | 0 |
| December | 1,418 | 0 |
| Year (annual) | 8,121 | 551 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00217107. 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 Rosemount been warmer than normal lately?
2025 averaged 45.5°F, 1.4°F above the 1991-2020 normal of 44.1°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 46.5°F | +2.4°F | – |
| 2022 | 43.0°F | −1.1°F | – |
| 2023 | 46.7°F | +2.6°F | – |
| 2024 | 48.3°F | +4.2°F | 35.78 |
| 2025 | 45.5°F | +1.4°F | – |
Over 63 complete years from 1952 to 2025, the station's annual mean temperature rose at a fitted 3.8°F per century (+0.21°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00217107; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Rosemount's climate compare?
Rosemount is warmer than 81 of the other 128 places with their own NOAA record in Minnesota, and wetter than 103. 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, Rosemount 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 Rosemount share this climate record?
5 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.
- Apple Valley, MNalso near: Farmington (5 mi, 45.7°F a year); Minneapolis (10 mi, 46.9°F a year)55,272 people · 5 mi W
- Empire, MN3,068 people · 3 mi S
- Hampton, MN714 people · 9 mi SE
- Vermillion, MN429 people · 7 mi SE
- Coates, MN136 people · 3 mi E
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 Rosemount's climate
What is the coldest month in Rosemount?
January, with a normal high of 22°F and a normal low of 3°F. The warmest is July (81°F by day, 61°F at night).
Does it snow in Rosemount?
Yes. NOAA publishes no 1991-2020 snowfall normal for Rosemount's NOAA station; the nearest record that keeps one, Farmington (5 miles away), records 41 inches of snow in a normal year.
What is the rainiest month in Rosemount?
June, with 4.88 in of precipitation in a normal year; the driest is February with 0.90 in.
What plant hardiness zone is Rosemount in?
The USDA's 2023 map puts Rosemount in zone 5a in ZIP code 55068. By the same method at Rosemount's NOAA station, the coldest night of a typical year reaches −21°F (28 years, 1991-2020): zone 4b.
How late can frost come in Rosemount?
In half of years the last 32°F night comes after May 2; 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
- Minnesota climateThe statewide normals and every place in the state
- Farmington, MN5 miles from this station, 45.7°F a year
- Hastings, MN12 miles from this station, 46.0°F a year
- Minneapolis, MN13 miles from this station, 46.9°F a year
- St. Paul, MN15 miles from this station, 46.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made