Jamestown State Hosp, ND Climate: Temperature & Rain by Month
Temperature and precipitation from NOAA NCEI 1991–2020 normals →, plus PlainClimate's derived comfort score
30-year climate normals (1991-2020) from Jamestown State Hosp's primary NOAA station, JAMESTOWN STATE HOSP.
The climate verdict for Jamestown State Hosp
Winter sets the terms in Jamestown State Hosp, North Dakota. A pronounced 60.7°F seasonal swing and heating demand above twice the cooling total frame an annual average of 41°F. At 49/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 18% of scores.
- 41°F
- average temperature, NOAA 1991-2020 normal
- 49/100
- comfort score, above 18% of station-mapped location scores
- 21.1"
- annual precipitation · 46" snow
- 144 days
- growing season, frost-free days
Jamestown State Hosp: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00324418 · Jamestown State Hosp, ND 41°F mean · 21.1" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-DRY · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 41°F
- RANK-COOL #549
- PHOTO-FINISH ≈ Napoleon
- PRCP-DRY 21.1"
- SWING-WIDE 61°F
- COMF-LOW 49/100
- LOAD-HEAT 9,062 HDD
- STN-1 USC00324418
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Napoleon, ND ( -0.1 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every ND station list.
- Jamestown State… (this station) 41°F
- Cold Casselton Agron…, ND 41°F
- Hot Lisbon, ND 41°F
- Near Napoleon, ND 41°F
- Near Fargo, ND 41°F
Jamestown State Hosp sits in North Dakota, the #2 coldest U.S. state at 41.0°F statewide annual average - see all 50 coldest states ranked by NOAA normals
Climate Living Index · Jamestown State Hosp
Jamestown State Hosp: 23/100 · grade F
Jamestown State Hosp publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Jamestown State Hosp, not an official NOAA rating. Rankings still use Comfort Score 49/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 21.1 in · 13.9 from 35 in | 51/100 · D |
| Snowfall burden | 46.1 inches/year | 23/100 · F |
| Frost-free season | 144 days/year | 21/100 · F |
| Normal heat + freeze calendar | 187 calendar days | 21/100 · F |
| Annual temperature balance | 41.3°F · 26.2° from 67.5°F | 8/100 · F |
Jamestown State Hosp · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Jamestown State Hosp is a continental Köppen climate: Dfb
Coldest-month mean 9.4°F and warmest-month mean 70.1°F place this station in continental, no dry season, warm summer climates (Dfb). Class Dfb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, warm summer.
- Köppen code
- Dfb
- Group
- Continental
- Warmest month
- 70.1°F
- Coldest month
- 9.4°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Jamestown State Hosp sits across the climate record
Three NOAA fields for Jamestown State Hosp's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 92%
- Among 6,861 stations, Jamestown State Hosp sits in the cooler third of annual means.
- Annual precipitation
- Drier than 71%
- Jamestown State Hosp's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Wider than 98%
- Warmest-to-coldest month gap for Jamestown State Hosp is large versus 6,861 complete station-years.
How Jamestown State Hosp compares across U.S. station-mapped locations
Jamestown State Hosp's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
49 18th percentile score exceeds 18% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). This entry sits in this band.
- 50–60: 1,329 station-mapped locations (21%). Above this entry.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Jamestown State Hosp's measured station temperature trend
MethodologyAcross 113 complete annual observations from 1894 to 2025, JAMESTOWN STATE HOSP warmed at a fitted rate of 0.14°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Jamestown State Hosp primary station fitted change +0.14 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 18°F (-8°C) | 0°F (-18°C) | 9°F (-13°C) | 0.5" | 11.4" | 30.8 | 0.0 |
| February | 23°F (-5°C) | 4°F (-15°C) | 14°F (-10°C) | 0.5" | 7.4" | 27.5 | 0.0 |
| March | 36°F (2°C) | 17°F (-8°C) | 26°F (-3°C) | 0.7" | 6.5" | 28.5 | 0.0 |
| April | 53°F (12°C) | 29°F (-1°C) | 41°F (5°C) | 1.2" | 2.5" | 17.4 | 0.1 |
| May | 67°F (19°C) | 43°F (6°C) | 55°F (13°C) | 3.4" | 0.4" | 3.3 | 0.5 |
| June | 77°F (25°C) | 54°F (12°C) | 65°F (18°C) | 3.6" | 0.0" | 0.0 | 1.8 |
| July | 82°F (28°C) | 59°F (15°C) | 70°F (21°C) | 3.6" | 0.0" | 0.0 | 4.1 |
| August | 80°F (27°C) | 56°F (13°C) | 68°F (20°C) | 2.3" | 0.0" | 0.0 | 3.1 |
| September | 71°F (22°C) | 46°F (8°C) | 59°F (15°C) | 2.2" | 0.0" | 1.1 | 1.1 |
| October | 55°F (13°C) | 33°F (1°C) | 44°F (7°C) | 1.9" | 1.9" | 13.9 | 0.1 |
| November | 38°F (3°C) | 19°F (-7°C) | 28°F (-2°C) | 0.5" | 4.2" | 27.5 | 0.0 |
| December | 24°F (-5°C) | 8°F (-14°C) | 16°F (-9°C) | 0.6" | 11.8" | 30.8 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 83°F around July 26, short of 90°F on every date, while 187 dates carry a normal low at or below freezing, the coldest 0°F near January 21.
The freezing stretch
The normal low stays at or below 32°F into April 22, then returns to freezing around October 19, covering 187 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is June 12, when 42% of years recorded at least a hundredth of an inch. The driest is November 22 at 18%. Summed across the calendar, that is about 95 wet dates a year.
The widest day
September 6 carries the biggest normal gap between afternoon and dawn, 25°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Jamestown State Hosp.
Where Jamestown State Hosp Stands Nationally
Freezing is routine here by normals standards — the normal low reaches 32°F or colder on about 187 nights a year, more than most ranked stations.
Jamestown State Hosp earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 11.4"
5.7 days with precipitation
Snow: 7.4"
5.8 days with precipitation
Snow: 6.5"
5.3 days with precipitation
Snow: 2.5"
7.6 days with precipitation
Snow: 0.4"
12.1 days with precipitation
12.6 days with precipitation
10.6 days with precipitation
8.2 days with precipitation
7.5 days with precipitation
Snow: 1.9"
7.4 days with precipitation
Snow: 4.2"
5.5 days with precipitation
Snow: 11.8"
6.3 days with precipitation
Jamestown State Hosp runs a summer-peaked wet season
45% of Jamestown State Hosp's yearly precipitation falls in June, July and August alone, against the 25% an evenly spread year would give those three months. The wettest month is June at 3.6", on a wide 60.7°F gap between its warmest and coldest month. Warm-season convection and, across the Southwest, the North American monsoon produce this shape: rain arrives in short heavy bursts during the hottest part of the year rather than as long cool-season soaking.
- Wettest three months: June, July, May, taking 50% of the annual total between them.
- Driest month: February at 0.5".
- Winter share: 7% falls in December, January and February.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A summer-peaked label means the June-August share reaches 35%; it describes timing across an average year, not any single season, and says nothing about how heavy an individual storm can be.
How Jamestown State Hosp's precipitation splits across the calendar
About 95 days a year record measurable precipitation here, carrying 21.1" between them, or roughly 0.22 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Winter brings real snow to Jamestown State Hosp
Jamestown State Hosp averages 46.1 inches of snowfall a year, with December the snowiest month on the normals, spread across roughly 23 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 46.1 inches of depth.
- Days recording measurable snow: about 23 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 22% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
September 29
50% probability date
Last Spring Freeze
May 8
50% probability date
Growing Season
144 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
9,062
Higher = more heating needed
Cooling Degree Days
450
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside ND closest to Jamestown State Hosp on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (41°F here).
- Ashland, WI 41°F · 0.0°F off
- Chester, MT 41°F · 0.0°F off
- Cumberland, WI 41°F · 0.0°F off
- Plainfield, VT 41°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (21.1" here), excluding temperature-peer places.
- Alpine, UT 21.1" · 0.0" off
- Idaho City, ID 21.1" · 0.0" off
- Beaver, OK 21.1" · 0.0" off
- Liberal, KS 21.1" · 0.0" off
Snow and freeze rhythm
When cold and snow define Jamestown State Hosp
heating led · moderate · high swing
Winter and seasonal range jointly define this record. Jamestown State Hosp logs 9,062 heating degree days, more than twice its 450 cooling total, while the typical coldest-to-warmest-month gap reaches 60.7°F. The annual mean therefore compresses two materially different seasons.
Only about 144 days are frost-free in a normal year. That short interval is consistent with the cold-season signal, but the measure does not predict the exact first or last freeze in any one year.
-
1. Jamestown State Hosp coldest normal
January
Averaging 9°F (-13°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Jamestown State Hosp typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Jamestown State Hosp snow peak
December
Jamestown State Hosp averages 46.1 inches of snow a year, with December the snowiest month on the normals.
Questions about Jamestown State Hosp's climate
How much snow does Jamestown State Hosp get? ▼
How cold does Jamestown State Hosp get in winter? ▼
How much energy does heating and cooling require in Jamestown State Hosp? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Jamestown State Hosp's primary station: JAMESTOWN STATE HOSP (USC00324418). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Jamestown State Hosp; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Jamestown State Hosp comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.