St. Paul, Minnesota Weather
Thunder stills across the plains. Day 93 of summer. Read this microseason across nine climate regions →
St. Paul weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 9:22 AM CDT · Open-Meteo
- TodaySep 21Heavy Drizzle later13%0.11″59°49°—
- TuesdaySep 22Clear——63°45°+4°
- WednesdaySep 23Overcast——68°44°+5°
- ThursdaySep 24Light Drizzle39%0.06″58°56°-10°
- FridaySep 25Drizzle—0.18″60°57°+2°
- SaturdaySep 26Light Drizzle24%0.02″64°58°+4°
- SundaySep 27Light Drizzle20%0.01″73°59°+9°
Air quality now AQI 26 · Good
AQI 26 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
September dries up ditches or breaks down bridges.
- Moonrise
- 5:00 PM
- Moonset
- 1:15 AM
- In sign
- ♑︎ Capricorn
Thunder stills across the plains
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
St. Paul at a glance
- Today vs. normal: Today averages 54°F (high 59°F, low 49°F), 7°F below the 61°F normal for Sep 21
- Last frost: April 24 (1991–2020 median, NOAA station 4 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, winter squash
16-Day Forecast — St. Paul
- Mon59°49°13%
- Tue63°45°2%
- Wed68°44°0%
- Thu58°56°39%
- Fri60°57°9%
- Sat64°58°24%
- Sun73°59°20%
- Mon75°52°32%
- Tue72°60°36%
- Wed62°53°26%
- Thu61°46°10%
- Fri55°47°26%
- Sat56°50°26%
- Sun56°46°23%
- Mon57°43°16%
- Tue58°41°10%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near St. Paul
Interactive wind and temperature map centered on St. Paul — it loads in your browser. Open the full weather map.
Right now in the garden
Fall planting + final harvests
As of September 21, the season's first frost (typically October 16) is approaching. Pick what frost-tender plants still carry before the next cold front. This city's planting calendar for September: plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, and winter squash.
Sun & seasons in St. Paul
St. Paul sits in Ramsey County, where the year’s longest day runs 15h 37m of daylight and its shortest just 8h 46m — a swing of +6h 50m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Minneapolis, the state’s largest city, lies about 8 miles to the W. The nearest town St. Paul tracks is Minneapolis, roughly 8 miles to the W.
Air quality in St. Paul
Air quality in St. Paul’s county has held roughly steady since 2020; its cleanest year on record was 2025 (median AQI 34). See the full air-quality history for St. Paul.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| April | lettuce, peas, spinach, radishes | radishes |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, spinach, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| July | tomatoes, peppers, beans, squash, fall brassicas, carrots | lettuce, peas, spinach, beans, summer squash, garlic |
| August | beans, squash, fall brassicas, carrots | tomatoes, peppers, beans, summer squash |
| September | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash |
| October | — | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| November | — | fall brassicas, carrots |
A year in weather
St. Paul's warmest month is July (~74°F mean) and its coldest is January (~14°F). Rainfall peaks in June (4.4 inches) and bottoms out in January (1.1 inches).
| Month | Mean temp | Precip |
|---|---|---|
| January | 14° | 1.1″ |
| February | 19° | 1.2″ |
| March | 31° | 2.1″ |
| April | 46° | 3.3″ |
| May | 57° | 3.9″ |
| June | 68° | 4.4″ |
| July | 74° | 3.5″ |
| August | 72° | 3.6″ |
| September | 64° | 3.9″ |
| October | 50° | 2.4″ |
| November | 32° | 2.2″ |
| December | 18° | 1.4″ |
Regional context
Similar climates Lilydale, MN, West St. Paul, MN, Falcon Heights, MN
St. Paul's climate, from modelled 1991-2020 normals (EC_Earth3P_HR model via Open-Meteo), pairs 14°F Januarys with 74°F Julys — a 59°F swing. About 33.1 inches of precipitation falls each year.
Precipitation in St. Paul runs summer-dominant: June averages 4.4 inches from warm-season storms, while January drops to 1.1 inches under drier cool air. That summer-storm rhythm groups St. Paul with places like Lilydale, MN, West St. Paul, MN and Falcon Heights, MN.
The cool-season window in St. Paul starts at April 24, when nights stop freezing — think kale, peas, spinach, and parsnips. Hold St. Paul's tender crops — tomatoes, peppers, basil — until 10-14 days past St. Paul's last frost. It shuts near October 16, when freezes return to St. Paul and tender plants need cover. Sheltered St. Paul yards can escape a light frost.
Similar climates: Lilydale, MN, West St. Paul, MN, Falcon Heights, MN, Maplewood, MN, Mendota Heights, MN.
Frequently asked
- When does it freeze in St. Paul?
- Frost typically leaves St. Paul by April 24 and returns to St. Paul near October 16.
- What is the rainy season in St. Paul?
- Rainfall in St. Paul peaks in June near 4.4 inches, out of about 33 inches annually.
- What is the warmest month in St. Paul?
- The warmest stretch in St. Paul comes in July, around 74°F on average.
- What is the coldest month in St. Paul?
- On average January is the chilliest month in St. Paul, about 14°F.
- When can I start a vegetable garden in St. Paul?
- Time tomatoes in St. Paul for two weeks after April 24; peas and greens start at St. Paul's frost line.
- What hardiness zone is St. Paul?
- St. Paul sits in the USDA zone set by January lows near 14°F; the USDA ZIP tool gives the band.
- What is the 10-day forecast for St. Paul?
- St. Paul's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in St. Paul?
- See this week's day-by-day rain chances for St. Paul in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in St. Paul?
- Current conditions for St. Paul and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the St. Paul forecast updated?
- The St. Paul forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in St. Paul?
- Today's sunrise and sunset times for St. Paul are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for St. Paul?
- The next few days in St. Paul's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
St. Paul sits at 44.9°N; its climate zone is warm-summer humid continental (Köppen approximation).
ZIP codes in St. Paul
- 55101
- 55102
- 55103
- 55104
- 55105
- 55106
- 55107
- 55108
- 55114
- 55116
- 55117
- 55119
- 55130
- 55131
- 55133
- 55144
- 55145
- 55146
- 55155
- 55164
- 55170