Jamestown, New York climate: Normal weather by month, frost dates and records
Jamestown's normal year runs from 16°F January nights to 80°F July afternoons, with 45.9 inches of precipitation and 98 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.5°C, January lows of −9°C, July highs of 27°C, 1,167 mm of precipitation a year.
- NOAA stationJamestown (4 mi ENE)
- Station IDUSC00304207
- Location42.11°N 79.16°W
- Elevation1,250 ft (381 m)
- From the center4 miles
- Population27,699
On October 22, the normal high in Jamestown is 58°F and the normal low 37°F, and the chance of measurable rain or snow is 48%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Jamestown.
- Jan 32° 16°
- Feb 35° 16°
- Mar 44° 23°
- Apr 57° 34°
- May 69° 44°
- Jun 77° 54°
- Jul 80° 57°
- Aug 79° 56°
- Sep 73° 50°
- Oct 61° 39°
- Nov 48° 31°
- Dec 37° 23°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Jamestown each month?
July is the warmest month, with normal highs of 80°F; January the coldest, with normal lows of 16°F. The most precipitation falls in July (4.55 in), the least in February (2.70 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 32°F | 16°F | 24.2°F | 3.81 | 29.8 | 20 | <1 | 29 | 9 h 30 min |
| February | 35°F | 16°F | 25.2°F | 2.70 | 19.3 | 16 | <1 | 26 | 10 h 30 min |
| March | 44°F | 23°F | 33.3°F | 3.16 | 15.3 | 15 | <1 | 25 | 11 h 50 min |
| April | 57°F | 34°F | 45.4°F | 3.91 | 2.7 | 14 | <1 | 15 | 13 h 20 min |
| May | 69°F | 44°F | 56.5°F | 3.94 | 0.0 | 13 | <1 | 3 | 14 h 30 min |
| June | 77°F | 54°F | 65.1°F | 4.36 | 0.0 | 13 | 1 | <1 | 15 h 10 min |
| July | 80°F | 57°F | 68.8°F | 4.55 | 0.0 | 12 | 2 | <1 | 15 h |
| August | 79°F | 56°F | 67.8°F | 3.59 | 0.0 | 12 | 1 | <1 | 14 h |
| September | 73°F | 50°F | 61.2°F | 4.19 | 0.0 | 11 | <1 | 1 | 12 h 30 min |
| October | 61°F | 39°F | 50.0°F | 4.11 | 0.4 | 14 | <1 | 7 | 11 h 10 min |
| November | 48°F | 31°F | 39.3°F | 3.69 | 9.3 | 14 | <1 | 19 | 9 h 50 min |
| December | 37°F | 23°F | 30.2°F | 3.92 | 21.6 | 18 | <1 | 27 | 9 h 10 min |
| Year (annual) | 58°F | 37°F | 47.3°F | 45.93 | 98.4 | 172 | 5 | 152 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 0°C | −9°C | −4.3°C | 97 mm | 76 cm |
| February | 1°C | −9°C | −3.8°C | 69 mm | 49 cm |
| March | 6°C | −5°C | 0.7°C | 80 mm | 39 cm |
| April | 14°C | 1°C | 7.4°C | 99 mm | 7 cm |
| May | 20°C | 7°C | 13.6°C | 100 mm | 0 cm |
| June | 25°C | 12°C | 18.4°C | 111 mm | 0 cm |
| July | 27°C | 14°C | 20.4°C | 116 mm | 0 cm |
| August | 26°C | 13°C | 19.9°C | 91 mm | 0 cm |
| September | 23°C | 10°C | 16.2°C | 106 mm | 0 cm |
| October | 16°C | 4°C | 10.0°C | 104 mm | 1 cm |
| November | 9°C | −1°C | 4.1°C | 94 mm | 24 cm |
| December | 3°C | −5°C | −1.0°C | 100 mm | 55 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00304207; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Jamestown?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September has the fewest days with rain (11).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00304207.
When is the last frost in Jamestown?
In Jamestown, the last spring frost (32°F) comes after May 8 in half of years and after May 25 in one year in ten; the first autumn frost comes before October 13 in half of years and before October 1 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- May 81 year in 10 after May 25; 9 in 10 after April 22
- First autumn frost, half of years before
- October 131 year in 10 before October 1; 9 in 10 before October 30
NOAA puts the median frost-free season at 158 days, and the season without a hard freeze (28°F) at 184 days.
A hard freeze (28°F) comes after April 25 in half of springs and before October 28 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Jamestown in zone 6a in ZIP code 14701, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Jamestown's NOAA station is in zone 5b: the coldest night of a typical year reaches −11°F (23 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in New York · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00304207; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Jamestown?
In a normal year in Jamestown, 5 days a year reach 90°F, 152 nights fall to 32°F or colder and 172 days bring measurable precipitation.
- Days at 90°F or more
- 5a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 152a normal year
- Days that stay below freezing
- 51high of 32°F or less
- Days with 0.01 inch of precipitation
- 172a normal year
- Days with 1 inch of snow or more
- 30a normal year
The highest temperature in Jamestown's official record (kept by the National Weather Service since 1895) is 103°F, on June 21, 1988; the lowest is −31°F, on January 5, 1904.
The wettest calendar year on that record is 2017, with 55.36 in; the snowiest season is 1976–77, with 149.3 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00304207; records: ACIS (NOAA Regional Climate Centers), NWS threaded record JSTN6thr. Records use complete months only; a month missing more than three days is left out.
How sunny is Jamestown?
Over a year 69% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Jamestown, 3.6 kWh per square metre a day. August is the sunniest month (79%) and December the cloudiest (47%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 52% | 1.4 |
| February | 56% | 2.2 |
| March | 60% | 3.3 |
| April | 65% | 4.5 |
| May | 71% | 5.5 |
| June | 75% | 6.0 |
| July | 79% | 6.0 |
| August | 79% | 5.4 |
| September | 76% | 4.2 |
| October | 63% | 2.6 |
| November | 58% | 1.6 |
| December | 47% | 1.1 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Jamestown need?
A normal year in Jamestown brings 6,848 heating degree days, 27% more than the median U.S. place (5,373), and 420 cooling degree days, 54% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,365 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,263 | 0 |
| February | 1,114 | 0 |
| March | 983 | 0 |
| April | 589 | 2 |
| May | 288 | 26 |
| June | 81 | 84 |
| July | 24 | 143 |
| August | 32 | 118 |
| September | 156 | 43 |
| October | 469 | 4 |
| November | 771 | 0 |
| December | 1,079 | 0 |
| Year (annual) | 6,848 | 420 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00304207. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Jamestown been warmer than normal lately?
2025 averaged 47.4°F, 0.1°F above the 1991-2020 normal of 47.3°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 49.8°F | +2.5°F | 51.16 | 71.9 |
| 2022 | 47.5°F | +0.2°F | 46.29 | 79.3 |
| 2023 | 49.9°F | +2.6°F | 42.34 | 47.1 |
| 2024 | 50.5°F | +3.2°F | 42.78 | 59.0 |
| 2025 | 47.4°F | +0.1°F | 42.93 | 106.7 |
Over 31 complete years from 1975 to 2025, the station's annual mean temperature rose at a fitted 5.0°F per century (+0.28°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00304207; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Jamestown's climate compare?
Jamestown is warmer than 63 of the other 130 places with their own NOAA record in New York, and wetter than 81. Across the 7,247 U.S. stations with normals, its annual mean of 47.3°F is warmer than 29%.
In the Köppen classification computed from these normals, Jamestown is Dfb: continental, no dry season, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Jamestown share this climate record?
7 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Falconer, NY2,228 people · 2 mi W
- Russell, PA1,300 people · 12 mi S
- Randolph, NY896 people · 10 mi E
- Sinclairville, NY562 people · 12 mi NW
- Sugar Grove, PA538 people · 13 mi SW
- Kennedy, NY234 people · 5 mi NE
- Bear Lake, PA143 people · 19 mi SW
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Jamestown's climate
What is the coldest month in Jamestown?
January, with a normal high of 32°F and a normal low of 16°F. The warmest is July (80°F by day, 57°F at night).
Does it snow in Jamestown?
Yes: 98 inches in a normal year, falling on 47 days with 0.1 inch or more, the most in January (29.8 inches).
What is the rainiest month in Jamestown?
July, with 4.55 in of precipitation in a normal year; the driest is February with 2.70 in.
What plant hardiness zone is Jamestown in?
The USDA's 2023 map puts Jamestown in zone 6a in ZIP code 14701, the nearest ZIP area. By the same method at Jamestown's NOAA station, the coldest night of a typical year reaches −11°F (23 years, 1991-2020): zone 5b.
How late can frost come in Jamestown?
In half of years the last 32°F night comes after May 8; in one year in ten it comes after May 25. Waiting until May 25 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Jamestown in OctoberThis month day by day, its records and recent years
- New York climateThe statewide normals and every place in the state
- Chandlers Valley (1 mi SE), PA14 miles from this station, 45.1°F a year
- Warren, PA18 miles from this station, 48.2°F a year
- Little Valley, NY20 miles from this station, 44.9°F a year
- Allegany, NY21 miles from this station, 46.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made