Marine Mill Site · Photo: McGhiever · CC BY-SA 4.0Hardly any U.S. towns see harsher January nights than Marine on St. Croix
High summer brings afternoon highs near 82°. Temperatures cover 77° across the year, low to high. Precipitation is light here, less than falls on 83% of U.S. towns. For walks and days out, the stretch from May to September brings highs of 69–82°.
A year in Marine on St. Croix at a glance
Each month’s typical high and low, and what it brings.
What stands out about Marine on St. Croix’s climate
Compared with towns across the U.S., with Marine on St. Croix’s place in Minnesota beside it.
What a year in Marine on St. Croix feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 154 frost-free days a year
In half of years the last 32° night comes by May 3 and the first by October 5. Frost and day counts come from NOAA’s station at Forest Lake 5ne, MN, 11 miles from the town’s center, at about the same height.
The 2023 USDA map puts Marine on St. Croix’s center in zone 4b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −22°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 52 inches of snow a winter
Snow, measured at Forest Lake 5ne, MN, falls mostly in December. Precipitation (rain plus melted snow) adds up to 33 inches a year; June is the wettest month and January the driest. Rain or snow falls on about 112 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Marine on St. Croix
93% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Forest Lake 5ne, MN.
Living with Marine on St. Croix’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
154 frost-free days in zone 4b. The last frost comes by May 3 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 5.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 11 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Marine on St. Croix from natural hazards, river flooding is the largest share (60%); heat waves, cold waves, winter storms and ice storms together are 10%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Marine on St. Croix and its neighbors
Every town next door is within a degree of Marine on St. Croix in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Marine on St. Croix’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Marine on St. Croix, MN | 6° | 82° | 33" | 52" |
| Saratoga, WI | 7° | 82° | 34" | 48" |
| Spirit Lake, IA | 7° | 83° | 31" | 42" |
| Plattsburgh, NY | 9° | 81° | 35" | 50" |
| Harrisburg, SD | 8° | 84° | 29" | 49" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Marine on St. Croix averaged 1.6° warmer than the 1900s. The biggest change is in January (+3.8°).
A bigger shift than in 66% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Marine on St. Croix compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Marine on St. Croix’s place among Minnesota’s.
Marine on St. Croix weather by month
Highs, lows and precipitation from NOAA’s grid at Marine on St. Croix’s center; snow, wet days and snow on the ground from Forest Lake 5ne, MN. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 23° | 6° | 0.8" | 9.6" | 8 | 29 | 3° – 27° |
| February | 29° | 9° | 0.9" | 9.3" | 6 | 26 | 7° – 31° |
| March | 42° | 22° | 1.6" | 9.2" | 8 | 19 | 23° – 46° |
| April | 56° | 34° | 2.9" | 3.7" | 10 | 3 | 34° – 53° |
| May | 69° | 46° | 4.2" | 0.0" | 12 | 0 | 53° – 65° |
| June | 78° | 57° | 4.7" | 0.0" | 13 | 0 | 64° – 71° |
| July | 82° | 61° | 4.3" | 0.0" | 11 | 0 | 65° – 77° |
| August | 80° | 59° | 4.4" | 0.0" | 10 | 0 | 65° – 73° |
| September | 72° | 51° | 3.3" | 0.0" | 10 | 0 | 54° – 67° |
| October | 58° | 38° | 2.9" | 0.6" | 10 | 0 | 41° – 53° |
| November | 41° | 26° | 1.7" | 7.4" | 7 | 7 | 24° – 45° |
| December | 28° | 13° | 1.1" | 11.8" | 8 | 22 | 7° – 30° |
| Year | 55° | 35° | 32.6" | 51.6" | 112 | 106 |
How much a month can swing
A normal is an average. January swings the most: from 1991 to 2020 its average ranged from 3° to 27°. June is the most reliable, staying within 8°.
Where Marine on St. Croix’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Marine on St. Croix’s center.
- Snow: Forest Lake 5ne, MN.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Forest Lake 5ne, MN, 11 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Marine on St. Croix’s climate
What is the weather like in Marine on St. Croix?
A typical July afternoon reaches 82°, a January night drops to 6°, and about 52 inches of snow falls in a normal winter. Colder January nights than 98% of U.S. towns; cooler July afternoons than 77% of U.S. towns.
How cold does it get in Marine on St. Croix in winter?
January nights average 6°. About 161 nights a year reach 32° or below and 30 reach 0° or below. In the coldest January of the last 30 years the month averaged 3°.
How much snow does Marine on St. Croix get?
About 52 inches in a normal winter at Forest Lake 5ne, MN, most of it in December, with snow on the ground about 106 days a year.
How hot does it get in Marine on St. Croix?
July, with a typical high of 82° and a low of 61°. About 14 days a year reach 90° (Forest Lake 5ne, MN).
When is the first and last frost in Marine on St. Croix?
In half of years the last spring frost (32°) comes by May 3 and the first fall frost by October 5, about 154 frost-free days, at Forest Lake 5ne, MN.
What growing zone is Marine on St. Croix in?
Zone 4b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −22°.
What is the best time of year to visit Marine on St. Croix?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Marine on St. Croix getting warmer?
Yes: 1991–2020 averaged 1.6° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 66% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Marine on St. Croix.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.