Norfolk, CT Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Norfolk's primary NOAA station, NORFOLK 2 SW.
The climate verdict for Norfolk
Water is the standout signal in Norfolk, Connecticut: 52.9 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 46°F. At 44/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 10% of scores.
- 46°F
- average temperature, NOAA 1991-2020 normal
- 44/100
- comfort score, above 10% of station-mapped location scores
- 52.9"
- annual precipitation · 75" snow
- 161 days
- frost-free growing season
Norfolk: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00065445 · Norfolk, CT 46°F mean · 52.9" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-WET · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 46°F
- RANK-COOL #1,509
- PHOTO-FINISH ≈ Trenton
- PRCP-WET 52.9"
- SWING-WIDE 47°F
- COMF-LOW 44/100
- LOAD-HEAT 7,311 HDD
- STN-1 USC00065445
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Trenton, UT (+ 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 CT station list.
- Norfolk (this station) 46°F
- Cold Lansing Manor, NY 46°F
- Hot Rigby, ID 46°F
- Near Trenton, UT 46°F
- Near E Sidney, NY 46°F
Climate Living Index · Norfolk
Norfolk: 31/100 · grade F
Norfolk publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Norfolk, not an official NOAA rating. Rankings still use Comfort Score 44/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 154 calendar days | 44/100 · D |
| Precipitation balance | 52.9 in · 17.9 from 35 in | 36/100 · F |
| Frost-free season | 161 days/year | 34/100 · F |
| Annual temperature balance | 45.9°F · 21.6° from 67.5°F | 23/100 · F |
| Snowfall burden | 74.9 inches/year | 8/100 · F |
Norfolk · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Norfolk is a continental Köppen climate: Dfb
Coldest-month mean 21.9°F and warmest-month mean 69.0°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
- 69.0°F
- Coldest month
- 21.9°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 Norfolk sits across the climate record
Three NOAA fields for Norfolk's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 78%
- Among 6,861 stations, Norfolk sits in the cooler third of annual means.
- Annual precipitation
- Top 14% wettest
- Norfolk's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- 69th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Norfolk compares across U.S. station-mapped locations
Norfolk's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
44 10th percentile score exceeds 10% 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
Norfolk's measured station temperature trend
MethodologyAcross 67 complete annual observations from 1948 to 2025, NORFOLK 2 SW warmed at a fitted rate of 0.24°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Norfolk primary station fitted change +0.24 °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 | 30°F (-1°C) | 14°F (-10°C) | 22°F (-6°C) | 4.0" | 17.8" | 29.3 | 0.0 |
| February | 32°F (0°C) | 15°F (-9°C) | 24°F (-5°C) | 3.3" | 17.5" | 27.0 | 0.0 |
| March | 40°F (5°C) | 23°F (-5°C) | 32°F (0°C) | 4.2" | 14.9" | 26.3 | 0.0 |
| April | 54°F (12°C) | 34°F (1°C) | 44°F (7°C) | 3.9" | 3.9" | 13.7 | 0.0 |
| May | 65°F (19°C) | 45°F (7°C) | 55°F (13°C) | 4.1" | 0.0" | 1.2 | 0.0 |
| June | 73°F (23°C) | 55°F (13°C) | 64°F (18°C) | 5.0" | 0.0" | 0.0 | 0.1 |
| July | 78°F (26°C) | 60°F (15°C) | 69°F (21°C) | 4.8" | 0.0" | 0.0 | 1.0 |
| August | 76°F (25°C) | 58°F (15°C) | 67°F (20°C) | 4.7" | 0.0" | 0.0 | 0.3 |
| September | 69°F (21°C) | 51°F (11°C) | 60°F (16°C) | 4.9" | 0.0" | 0.2 | 0.0 |
| October | 57°F (14°C) | 40°F (4°C) | 48°F (9°C) | 5.1" | 1.4" | 6.6 | 0.0 |
| November | 45°F (7°C) | 30°F (-1°C) | 38°F (3°C) | 4.1" | 4.4" | 19.3 | 0.0 |
| December | 35°F (1°C) | 21°F (-6°C) | 28°F (-2°C) | 4.9" | 15.0" | 27.8 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 79°F around July 14, short of 90°F on every date, while 154 dates carry a normal low at or below freezing, the coldest 13°F near January 26.
The freezing stretch
The normal low stays at or below 32°F into April 11, then returns to freezing around November 10, covering 154 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 May 10, when 46% of years recorded at least a hundredth of an inch. The driest is September 1 at 33%. Summed across the calendar, that is about 148 wet dates a year.
The widest day
April 25 carries the biggest normal gap between afternoon and dawn, 21°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Norfolk.
Where Norfolk Stands Nationally
Among the steadiest day-night climates ranked: even the widest normal daily swing holds to roughly 21°F.
The normal water year runs well above the national norm at roughly 53 inches.
Norfolk earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 17.8"
13.1 days with precipitation
Snow: 17.5"
11.6 days with precipitation
Snow: 14.9"
12.4 days with precipitation
Snow: 3.9"
12.7 days with precipitation
14.1 days with precipitation
13.0 days with precipitation
11.8 days with precipitation
11.4 days with precipitation
10.4 days with precipitation
Snow: 1.4"
12.2 days with precipitation
Snow: 4.4"
11.4 days with precipitation
Snow: 15.0"
13.8 days with precipitation
Norfolk 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. Norfolk has no dry season to plan around, though it does carry a wide 47.1°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: October averages 5.1" and February 3.3". The three wettest months together take 28% 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.
When it rains in Norfolk, it arrives in quantity
52.9" of precipitation falls across only about 148 wet days here, averaging 0.36 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 148 a year, 41% of all days
- Average depth per wet day
- 0.36 inches
- Most wet days
- May, about 14
- Fewest wet days
- September, about 10
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Winter brings real snow to Norfolk
Norfolk averages 74.9 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 38 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: 74.9 inches of depth.
- Days recording measurable snow: about 38 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 14% 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 11
50% probability date
Last Spring Freeze
May 3
50% probability date
Growing Season
161 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,311
Higher = more heating needed
Cooling Degree Days
370
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside CT closest to Norfolk 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 (46°F here).
- Bradford, PA 46°F · 0.0°F off
- Elkader, IA 46°F · 0.0°F off
- Milan, MN 46°F · 0.0°F off
- New Ulm, MN 46°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (52.9" here), excluding temperature-peer places.
- Lewisville, AR 53.0" · 0.0" off
- Jonesboro, GA 52.9" · 0.0" off
- Swannanoa, NC 53.0" · 0.1" off
- Crestwood, KY 52.9" · 0.1" off
Snow and freeze rhythm
When cold and snow define Norfolk
heating led · wet · mid swing
Norfolk's energy balance leans toward cold weather: 7,311 annual heating degree days against 370 for cooling. Its 47.1°F seasonal range still makes the monthly rows more useful than the annual average alone.
Norfolk's frost-free season lasts about 161 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Norfolk coldest normal
January
Averaging 22°F (-6°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Norfolk typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Norfolk snow peak
January
Norfolk averages 74.9 inches of snow a year, with January the snowiest month on the normals.
Questions about Norfolk's climate
How much snow does Norfolk get? ▼
How cold does Norfolk get in winter? ▼
How much energy does heating and cooling require in Norfolk? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Norfolk's primary station: NORFOLK 2 SW (USC00065445). 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 a census-designated place (GEOID 0953400), not an incorporated municipality. Match rule for Norfolk: 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 Norfolk 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.