Winter nights in Blue River are colder than in 94% of U.S. towns
Sunny July days climb to about 83°. Its yearly precipitation falls short of 74% of U.S. towns. The latest 30-year average runs 1.0° warmer than 1901–2000’s, with December up the most. Keep the boiler serviced for the months from October to April, which average under 50°.
A year in Blue River at a glance
Each month’s typical high and low, and what it brings.
What stands out about Blue River’s climate
Compared with towns across the U.S., with Blue River’s place in Wisconsin beside it.
What a year in Blue River feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 155 frost-free days a year
In half of years the last 32° night comes by May 3 and the first by October 7. Frost and day counts come from NOAA’s station at Boscobel Airport, 6 miles from the town’s center, at about the same height.
The 2023 USDA map puts Blue River’s center in zone 5a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −19°. 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 38 inches of snow a winter
Snow, measured at Gays Mills, WI, falls mostly in January. Precipitation (rain plus melted snow) adds up to 36 inches a year; June is the wettest month and January the driest. Rain or snow falls on about 99 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Blue River
90% 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 Boscobel Airport.
Living with Blue River’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
155 frost-free days in zone 5a. 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 7.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 0.0 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Blue River from natural hazards, river flooding is the largest share (62%); heat waves, cold waves, winter storms and ice storms together are 16%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Blue River and similar climates
TownRatings has no climate map of the towns around Blue River yet.
Climates most like Blue River’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 |
|---|---|---|---|---|
| Blue River, WI | 10° | 83° | 36" | 38" |
| Boone, IA | 11° | 84° | 36" | 36" |
| Hastings, MN | 7° | 83° | 33" | 41" |
| Colchester, VT | 10° | 81° | 38" | 50" |
| Roselle, IL | 15° | 84° | 38" | 42" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Blue River averaged 1.0° warmer than the 1900s. The biggest change is in December (+2.8°).
A smaller shift than in 75% 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 Blue River compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Blue River’s place among Wisconsin’s.
Blue River weather by month
Highs, lows and precipitation from NOAA’s grid at Blue River’s center; snow, wet days and snow on the ground from Gays Mills, WI. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 28° | 10° | 1.2" | 10.8" | 8 | 23 | 8° – 32° |
| February | 33° | 14° | 1.2" | 7.8" | 6 | 23 | 10° – 35° |
| March | 45° | 25° | 2.0" | 5.9" | 8 | 10 | 27° – 50° |
| April | 59° | 36° | 3.7" | 1.6" | 9 | 1 | 38° – 53° |
| May | 70° | 47° | 4.3" | 0.0" | 11 | 0 | 52° – 66° |
| June | 80° | 57° | 5.4" | 0.0" | 11 | 0 | 65° – 73° |
| July | 83° | 61° | 4.4" | 0.0" | 8 | 0 | 66° – 79° |
| August | 81° | 59° | 4.0" | 0.0" | 8 | 0 | 65° – 76° |
| September | 74° | 51° | 3.8" | 0.0" | 8 | 0 | 56° – 68° |
| October | 61° | 39° | 2.7" | 0.1" | 8 | 0 | 45° – 56° |
| November | 46° | 28° | 2.1" | 1.9" | 7 | 2 | 28° – 47° |
| December | 33° | 17° | 1.4" | 9.7" | 7 | 15 | 10° – 35° |
| Year | 58° | 37° | 36.2" | 37.8" | 99 | 75 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 10° to 35°. June is the most reliable, staying within 8°.
Where Blue River’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 Blue River’s center.
- Snow: Gays Mills, WI.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Boscobel Airport, 6 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 Blue River’s climate
What is the weather like in Blue River?
A typical July afternoon reaches 83°, a January night drops to 10°, and about 38 inches of snow falls in a normal winter. Colder January nights than 94% of U.S. towns; cooler July afternoons than 71% of U.S. towns.
How cold does it get in Blue River in winter?
January nights average 10°. About 152 nights a year reach 32° or below and 20 reach 0° or below. In the coldest January of the last 30 years the month averaged 8°.
How much snow does Blue River get?
About 38 inches in a normal winter at Gays Mills, WI, most of it in January, with snow on the ground about 75 days a year.
How hot does it get in Blue River?
July, with a typical high of 83° and a low of 61°. About 19 days a year reach 90° (Boscobel Airport).
When is the first and last frost in Blue River?
In half of years the last spring frost (32°) comes by May 3 and the first fall frost by October 7, about 155 frost-free days, at Boscobel Airport.
What growing zone is Blue River in?
Zone 5a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −19°.
What is the best time of year to visit Blue River?
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 Blue River getting warmer?
Yes: 1991–2020 averaged 1.0° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 75% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Blue River.
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.