Jamestown, NY Climate: Temperature & Rain by Month
Average temperature and precipitation from NOAA NCEI 1991–2020 normals →, with a derived climate comfort score
30-year climate normals (1991-2020) from Jamestown's primary NOAA station, JAMESTOWN 4 ENE.
The climate verdict for Jamestown
Water is the standout signal in Jamestown, New York: 45.9 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 47°F. At 54/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 31% of scores.
- 47°F
- annual average temperature (NOAA normal)
- 54/100
- comfort score, above 31% of station-mapped location scores
- 45.9"
- annual precipitation · 98" snow
- 158 days
- growing season, frost-free days
Jamestown: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00304207 · Jamestown, NY 47°F mean · 45.9" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 47°F
- RANK-COOL #1,921
- PHOTO-FINISH ≈ Nunn
- PRCP-MID 45.9"
- SWING-MID 45°F
- COMF-LOW 54/100
- LOAD-HEAT 6,848 HDD
- STN-1 USC00304207
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Nunn, CO (+ 0 °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 NY station list.
- Jamestown (this station) 47°F
- Hot Lages, NV 47°F
- Near Nunn, CO 47°F
- Near Bakersville, CT 47°F
- Near Stevenson Dam, PA 47°F
Climate Living Index · Jamestown
Jamestown: 36/100 · grade F
Jamestown 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, not an official NOAA rating. Rankings still use Comfort Score 54/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 45.9 in · 10.9 from 35 in | 62/100 · C |
| Normal heat + freeze calendar | 153 calendar days | 44/100 · D |
| Frost-free season | 158 days/year | 32/100 · F |
| Annual temperature balance | 47.3°F · 20.2° from 67.5°F | 29/100 · F |
| Snowfall burden | 98.4 inches/year | 0/100 · F |
Jamestown · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Jamestown is a continental Köppen climate: Dfb
Coldest-month mean 24.2°F and warmest-month mean 68.8°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
- 68.8°F
- Coldest month
- 24.2°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 sits across the climate record
Three NOAA fields for Jamestown's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 72%
- Among 6,861 stations, Jamestown sits in the cooler third of annual means.
- Annual precipitation
- Top 30% wettest
- Jamestown's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- 56th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Jamestown compares across U.S. station-mapped locations
Jamestown's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
54 31st percentile score exceeds 31% 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%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). This entry sits in this band.
- 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's measured station temperature trend
MethodologyAcross 31 complete annual observations from 1975 to 2025, JAMESTOWN 4 ENE warmed at a fitted rate of 0.28°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Jamestown primary station fitted change +0.28 °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 | 32°F (0°C) | 16°F (-9°C) | 24°F (-4°C) | 3.8" | 29.8" | 28.5 | 0.0 |
| February | 35°F (1°C) | 16°F (-9°C) | 25°F (-4°C) | 2.7" | 19.3" | 26.0 | 0.0 |
| March | 44°F (6°C) | 23°F (-5°C) | 33°F (1°C) | 3.2" | 15.3" | 25.4 | 0.0 |
| April | 57°F (14°C) | 34°F (1°C) | 45°F (7°C) | 3.9" | 2.7" | 15.3 | 0.0 |
| May | 69°F (20°C) | 44°F (7°C) | 57°F (14°C) | 3.9" | 0.0" | 2.7 | 0.3 |
| June | 77°F (25°C) | 54°F (12°C) | 65°F (18°C) | 4.4" | 0.0" | 0.0 | 1.2 |
| July | 80°F (27°C) | 57°F (14°C) | 69°F (20°C) | 4.5" | 0.0" | 0.0 | 2.0 |
| August | 79°F (26°C) | 56°F (13°C) | 68°F (20°C) | 3.6" | 0.0" | 0.0 | 1.1 |
| September | 73°F (23°C) | 50°F (10°C) | 61°F (16°C) | 4.2" | 0.0" | 0.5 | 0.4 |
| October | 61°F (16°C) | 39°F (4°C) | 50°F (10°C) | 4.1" | 0.4" | 7.1 | 0.0 |
| November | 48°F (9°C) | 31°F (-1°C) | 39°F (4°C) | 3.7" | 9.3" | 19.0 | 0.0 |
| December | 37°F (3°C) | 23°F (-5°C) | 30°F (-1°C) | 3.9" | 21.6" | 27.0 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 81°F around July 13, short of 90°F on every date, while 153 dates carry a normal low at or below freezing, the coldest 14°F near January 31.
The freezing stretch
The normal low stays at or below 32°F into April 10, then returns to freezing around November 10, covering 153 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 January 8, when 62% of years recorded at least a hundredth of an inch. The driest is August 31 at 35%. Summed across the calendar, that is about 173 wet dates a year.
The widest day
May 9 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.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 29.8"
19.9 days with precipitation
Snow: 19.3"
16.0 days with precipitation
Snow: 15.3"
14.6 days with precipitation
Snow: 2.7"
14.0 days with precipitation
13.3 days with precipitation
12.9 days with precipitation
12.3 days with precipitation
11.5 days with precipitation
11.0 days with precipitation
Snow: 0.4"
14.4 days with precipitation
Snow: 9.3"
14.3 days with precipitation
Snow: 21.6"
17.8 days with precipitation
Jamestown spreads its precipitation across the year
Neither half of the year dominates here: June through August take 27% of the annual total and December through February 23%, with neither reaching the 35% that would mark a distinct wet season. Jamestown has no dry season to plan around, though it does carry a 44.6°F seasonal spread.
The gap between the wettest and driest month still matters: July averages 4.5" and February 2.7". The three wettest months together take 29% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
How Jamestown's precipitation splits across the calendar
About 172 days a year record measurable precipitation here, carrying 45.9" between them, or roughly 0.27 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
Jamestown averages 98.4 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 47 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: 98.4 inches of depth.
- Days recording measurable snow: about 47 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 21% 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
October 13
50% probability date
Last Spring Freeze
May 8
50% probability date
Growing Season
158 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,848
Higher = more heating needed
Cooling Degree Days
420
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside NY closest to Jamestown 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 (47°F here).
- Alton, UT 47°F · 0.0°F off
- Atkinson, NE 47°F · 0.0°F off
- Charlotte, MI 47°F · 0.0°F off
- Emmetsburg, IA 47°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (45.9" here), excluding temperature-peer places.
- Chatham, MA 45.9" · 0.0" off
- Chester, SC 45.9" · 0.0" off
- Claremore, OK 45.9" · 0.0" off
- Lebanon, VA 45.9" · 0.0" off
Snow and freeze rhythm
When cold and snow define Jamestown
heating led · wet · mid swing
Jamestown's energy balance leans toward cold weather: 6,848 annual heating degree days against 420 for cooling. Its 44.6°F seasonal range still makes the monthly rows more useful than the annual average alone.
Jamestown's frost-free season lasts about 158 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Jamestown coldest normal
January
Averaging 24°F (-4°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Jamestown typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Jamestown snow peak
January
Jamestown averages 98.4 inches of snow a year, with January the snowiest month on the normals.
Questions about Jamestown's climate
How much snow does Jamestown get? ▼
How cold does Jamestown get in winter? ▼
How much energy does heating and cooling require in Jamestown? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Jamestown's primary station: JAMESTOWN 4 ENE (USC00304207). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 3638264). Match rule for Jamestown: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Jamestown 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.