Hardly any U.S. towns see harsher January nights than Jim River Valley Township
On a normal July day the thermometer tops out near 81°. Only 81° separates winter nights from summer afternoons. By precipitation alone, it ranks drier than 89% of U.S. towns. Homes need heating from October to April, the months averaging under 50°.
A year in Jim River Valley Township at a glance
Each month’s typical high and low, and what it brings.
What stands out about Jim River Valley Township’s climate
Compared with towns across the U.S., with Jim River Valley Township’s place in North Dakota beside it.
What a year in Jim River Valley Township feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 138 frost-free days a year
In half of years the last 32° night comes by May 11 and the first by September 28. Frost and day counts come from NOAA’s station at Jamestown Muni Airport, 14 miles from the town’s center, at about the same height.
The 2023 USDA map puts Jim River Valley Township’s center in zone 4a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −25°. 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 46 inches of snow a winter
Snow, measured at Jamestown State Hosp, ND, falls mostly in January and December. Precipitation (rain plus melted snow) adds up to 20 inches a year; July is the wettest month and January the driest. Rain or snow falls on about 95 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Jim River Valley Township
96% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through May.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Jamestown Muni Airport.
Living with Jim River Valley Township’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
138 frost-free days in zone 4a. The last frost comes by May 11 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Sep 28.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 39 miles of trails are waiting.
Parks & trails →Cold waves are 44% of the yearly building losses FEMA expects in Jim River Valley Township from natural hazards, the largest share. Normals are averages; the hazards page covers the extremes.
Natural hazards →Jim River Valley Township and its neighbors
Every town next door is within a degree of Jim River Valley Township in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Jim River Valley Township’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 |
|---|---|---|---|---|
| Jim River Valley Township, ND | 0° | 81° | 20" | 46" |
| Watertown, SD | 2° | 81° | 25" | 41" |
| Morris, MN | 2° | 82° | 26" | 45" |
| Gunnison, CO | 0° | 82° | 12" | 50" |
| Kingsford, MI | 5° | 80° | 29" | 61" |
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 Jim River Valley Township averaged 1.3° warmer than the 1900s. The biggest change is in January (+3.6°).
A smaller shift than in 58% 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 Jim River Valley Township compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Jim River Valley Township’s place among North Dakota’s.
Jim River Valley Township weather by month
Highs, lows and precipitation from NOAA’s grid at Jim River Valley Township’s center; snow, wet days and snow on the ground from Jamestown State Hosp, ND. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 19° | 0° | 0.4" | 11.4" | 6 | −4° – 25° |
| February | 23° | 4° | 0.5" | 7.4" | 6 | −2° – 26° |
| March | 36° | 17° | 0.7" | 6.5" | 5 | 14° – 41° |
| April | 53° | 30° | 1.2" | 2.5" | 8 | 31° – 49° |
| May | 67° | 42° | 3.0" | 0.4" | 12 | 50° – 61° |
| June | 76° | 53° | 3.5" | 0.0" | 13 | 60° – 69° |
| July | 81° | 57° | 3.6" | 0.0" | 11 | 63° – 74° |
| August | 80° | 55° | 2.5" | 0.0" | 8 | 61° – 71° |
| September | 71° | 45° | 2.1" | 0.0" | 8 | 53° – 63° |
| October | 55° | 33° | 1.7" | 1.9" | 7 | 35° – 49° |
| November | 37° | 19° | 0.6" | 4.2" | 6 | 15° – 39° |
| December | 24° | 7° | 0.6" | 11.8" | 6 | 1° – 24° |
| Year | 52° | 30° | 20.2" | 46.1" | 95 |
How much a month can swing
A normal is an average. January swings the most: from 1991 to 2020 its average ranged from -4° to 25°. June is the most reliable, staying within 10°.
Where Jim River Valley Township’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 Jim River Valley Township’s center.
- Snow: Jamestown State Hosp, ND.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Jamestown Muni Airport, 14 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 Jim River Valley Township’s climate
What is the weather like in Jim River Valley Township?
A typical July afternoon reaches 81°, a January night drops to 0°, and about 46 inches of snow falls in a normal winter. Colder January nights than all but 45 U.S. towns; cooler July afternoons than 88% of U.S. towns.
How cold does it get in Jim River Valley Township in winter?
January nights average 0°. About 181 nights a year reach 32° or below and 41 reach 0° or below. In the coldest January of the last 30 years the month averaged −4°.
How much snow does Jim River Valley Township get?
About 46 inches in a normal winter at Jamestown State Hosp, ND, most of it in January and December.
How hot does it get in Jim River Valley Township?
July, with a typical high of 81° and a low of 57°. About 9 days a year reach 90° (Jamestown Muni Airport).
When is the first and last frost in Jim River Valley Township?
In half of years the last spring frost (32°) comes by May 11 and the first fall frost by September 28, about 138 frost-free days, at Jamestown Muni Airport.
What growing zone is Jim River Valley Township in?
Zone 4a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −25°.
What is the best time of year to visit Jim River Valley Township?
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 Jim River Valley Township getting warmer?
Yes: 1991–2020 averaged 1.3° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 58% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Jim River Valley Township.
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.