Norwich, New York climate: Normal weather by month, frost dates and records
Norwich's normal year runs from 12°F January nights to 81°F July afternoons, with 45.3 inches of precipitation and 75 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.7°C, January lows of −11°C, July highs of 27°C, 1,150 mm of precipitation a year.
- NOAA stationNorwich
- Station IDUSC00306085
- Location42.51°N 75.52°W
- Elevation989 ft (301 m)
- From the center1 miles
- Population6,608
On October 23, the normal high in Norwich is 57°F and the normal low 35°F, and the chance of measurable rain or snow is 47%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Norwich.
- Jan 32° 12°
- Feb 34° 12°
- Mar 43° 20°
- Apr 57° 32°
- May 69° 43°
- Jun 77° 52°
- Jul 81° 57°
- Aug 79° 55°
- Sep 73° 48°
- Oct 60° 37°
- Nov 47° 27°
- Dec 37° 20°
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 Norwich each month?
July is the warmest month, with normal highs of 81°F; January the coldest, with normal lows of 12°F. The most precipitation falls in June (4.95 in), the least in February (2.73 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 32°F | 12°F | 21.7°F | 3.18 | 17.8 | 18 | <1 | 29 | 9 h 20 min |
| February | 34°F | 12°F | 22.8°F | 2.73 | 17.4 | 14 | <1 | 27 | 10 h 30 min |
| March | 43°F | 20°F | 31.3°F | 3.51 | 14.7 | 15 | <1 | 26 | 11 h 50 min |
| April | 57°F | 32°F | 44.2°F | 3.80 | 2.3 | 15 | <1 | 16 | 13 h 20 min |
| May | 69°F | 43°F | 55.7°F | 3.59 | 0.0 | 14 | <1 | 4 | 14 h 30 min |
| June | 77°F | 52°F | 64.7°F | 4.95 | 0.0 | 13 | 2 | <1 | 15 h 20 min |
| July | 81°F | 57°F | 68.8°F | 4.38 | 0.0 | 13 | 3 | <1 | 15 h |
| August | 79°F | 55°F | 67.4°F | 4.42 | 0.0 | 13 | 1 | <1 | 14 h |
| September | 73°F | 48°F | 60.2°F | 4.02 | 0.0 | 12 | 1 | 1 | 12 h 30 min |
| October | 60°F | 37°F | 48.6°F | 3.88 | 0.3 | 15 | <1 | 9 | 11 h 10 min |
| November | 47°F | 27°F | 37.4°F | 3.22 | 5.6 | 15 | <1 | 21 | 9 h 50 min |
| December | 37°F | 20°F | 28.2°F | 3.59 | 16.7 | 17 | <1 | 27 | 9 h 10 min |
| Year (annual) | 57°F | 35°F | 45.9°F | 45.27 | 74.8 | 173 | 6 | 160 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 0°C | −11°C | −5.7°C | 81 mm | 45 cm |
| February | 1°C | −11°C | −5.1°C | 69 mm | 44 cm |
| March | 6°C | −7°C | −0.4°C | 89 mm | 37 cm |
| April | 14°C | 0°C | 6.8°C | 97 mm | 6 cm |
| May | 21°C | 6°C | 13.2°C | 91 mm | 0 cm |
| June | 25°C | 11°C | 18.2°C | 126 mm | 0 cm |
| July | 27°C | 14°C | 20.4°C | 111 mm | 0 cm |
| August | 26°C | 13°C | 19.7°C | 112 mm | 0 cm |
| September | 23°C | 9°C | 15.7°C | 102 mm | 0 cm |
| October | 16°C | 3°C | 9.2°C | 99 mm | 1 cm |
| November | 9°C | −3°C | 3.0°C | 82 mm | 14 cm |
| December | 3°C | −7°C | −2.1°C | 91 mm | 42 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00306085; 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 Norwich?
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 (12).
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 USC00306085.
When is the last frost in Norwich?
In Norwich, the last spring frost (32°F) comes after May 13 in half of years and after May 27 in one year in ten; the first autumn frost comes before October 4 in half of years and before September 20 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 131 year in 10 after May 27; 9 in 10 after April 28
- First autumn frost, half of years before
- October 41 year in 10 before September 20; 9 in 10 before October 18
NOAA puts the median frost-free season at 142 days, and the season without a hard freeze (28°F) at 164 days.
A hard freeze (28°F) comes after May 1 in half of springs and before October 15 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Norwich in zone 5b in ZIP code 13815, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Norwich's NOAA station is in zone 5b: the coldest night of a typical year reaches −13°F (29 complete years).
Frost dates for every NOAA station in New York · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00306085; 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 Norwich?
In a normal year in Norwich, 6 days a year reach 90°F, 160 nights fall to 32°F or colder and 173 days bring measurable precipitation.
- Days at 90°F or more
- 6a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 160a normal year
- Days that stay below freezing
- 45high of 32°F or less
- Days with 0.01 inch of precipitation
- 173a normal year
- Days with 1 inch of snow or more
- 22a normal year
The highest temperature in this station's record (since 1906) is 101°F, on July 9, 1936; the lowest is −32°F, on January 15, 1957.
The wettest calendar year on that record is 2011, with 62.50 in; the snowiest season is 1955–56, with 123.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00306085; records: ACIS (NOAA Regional Climate Centers), station USC00306085. Records use complete months only; a month missing more than three days is left out.
How sunny is Norwich?
Over a year 68% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Norwich, 3.7 kWh per square metre a day. July is the sunniest month (76%) and December the cloudiest (52%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 57% | 1.5 |
| February | 62% | 2.4 |
| March | 66% | 3.6 |
| April | 65% | 4.5 |
| May | 68% | 5.4 |
| June | 70% | 5.8 |
| July | 76% | 5.9 |
| August | 75% | 5.2 |
| September | 73% | 4.1 |
| October | 63% | 2.6 |
| November | 60% | 1.7 |
| December | 52% | 1.2 |
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 Norwich need?
A normal year in Norwich brings 7,295 heating degree days, 36% more than the median U.S. place (5,373), and 375 cooling degree days, 59% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,236 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,344 | 0 |
| February | 1,182 | 0 |
| March | 1,045 | 0 |
| April | 626 | 2 |
| May | 306 | 17 |
| June | 83 | 74 |
| July | 20 | 140 |
| August | 34 | 107 |
| September | 178 | 34 |
| October | 510 | 2 |
| November | 828 | 0 |
| December | 1,141 | 0 |
| Year (annual) | 7,295 | 375 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00306085. 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 Norwich been warmer than normal lately?
2025 averaged 44.8°F, 1.1°F below the 1991-2020 normal of 45.9°F. 3 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 46.0°F | +0.1°F | 46.43 | – |
| 2022 | 45.9°F | at normal | 44.06 | 51.7 |
| 2023 | 46.7°F | +0.8°F | 49.23 | 29.8 |
| 2024 | 47.5°F | +1.6°F | 42.49 | – |
| 2025 | 44.8°F | −1.1°F | 43.71 | 43.0 |
Over 89 complete years from 1908 to 2025, the station's annual mean temperature rose at a fitted 3.1°F per century (+0.17°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00306085; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Norwich's climate compare?
Norwich is warmer than 41 of the other 130 places with their own NOAA record in New York, and wetter than 77. Across the 7,247 U.S. stations with normals, its annual mean of 45.9°F is warmer than 23%.
In the Köppen classification computed from these normals, Norwich 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 Norwich share this climate record?
3 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.
- Oxford, NY1,329 people · 6 mi SW
- Guilford, NY377 people · 7 mi S
- Gilbertsville, NY328 people · 10 mi E
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 Norwich's climate
What is the coldest month in Norwich?
January, with a normal high of 32°F and a normal low of 12°F. The warmest is July (81°F by day, 57°F at night).
Does it snow in Norwich?
Yes: 75 inches in a normal year, falling on 47 days with 0.1 inch or more, the most in January (17.8 inches).
What is the rainiest month in Norwich?
June, with 4.95 in of precipitation in a normal year; the driest is February with 2.73 in.
What plant hardiness zone is Norwich in?
The USDA's 2023 map puts Norwich in zone 5b in ZIP code 13815, the nearest ZIP area. By the same method at Norwich's NOAA station, the coldest night of a typical year reaches −13°F (29 years, 1991-2020): zone 5b.
How late can frost come in Norwich?
In half of years the last 32°F night comes after May 13; in one year in ten it comes after May 27. Waiting until May 27 leaves about a one-in-ten chance of a later frost.
Nearby and next
- New York climateThe statewide normals and every place in the state
- Sherburne, NY11 miles from this station, 45.8°F a year
- East Sidney, NY19 miles from this station, 45.8°F a year
- Morrisville, NY25 miles from this station, 44.3°F a year
- Whitney Point, NY25 miles from this station, 46.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made