Errol, NH Climate: Temperature & Rain by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from Errol's primary NOAA station, ERROL AP.
The climate verdict for Errol
Errol, New Hampshire has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 40°F. At 52/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 24% of scores.
- 40°F
- yearly average temperature, NOAA normal
- 52/100
- comfort score, above 24% of station-mapped location scores
- 44.6"
- precipitation, annual total
- 124 days
- growing season, frost-free days
Errol: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00272846 · Errol, NH 40°F mean · 44.6" precip
TEMP-COLD · RANK-COOL · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COLD 40°F
- RANK-COOL #343
- PHOTO-FINISH ≈ E Haven
- PRCP-MID 44.6"
- SWING-WIDE 52°F
- COMF-LOW 52/100
- LOAD-HEAT 9,364 HDD
- STN-1 USC00272846
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: E Haven, VT (+ 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 NH station list.
- Errol (this station) 40°F
- Hot Laona, WI 40°F
- Near E Haven, VT 40°F
- Near Tahquamenon Fal…, MI 40°F
- Near Colebrook, NH 40°F
Climate Living Index · Errol
Errol: 20/100 · grade F
Errol publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Errol, not an official NOAA rating. Rankings still use Comfort Score 52/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 44.6 in · 9.6 from 35 in | 66/100 · C |
| Normal heat + freeze calendar | 198 calendar days | 15/100 · F |
| Frost-free season | 124 days/year | 9/100 · F |
| Annual temperature balance | 39.5°F · 28.0° from 67.5°F | 3/100 · F |
Errol · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Errol is a continental Köppen climate: Dfb
Coldest-month mean 12.3°F and warmest-month mean 64.5°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
- 64.5°F
- Coldest month
- 12.3°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 Errol sits across the climate record
Three NOAA fields for Errol's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 95%
- Among 6,861 stations, Errol sits in the cooler third of annual means.
- Annual precipitation
- 68th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Wider than 86%
- Warmest-to-coldest month gap for Errol is large versus 6,861 complete station-years.
How Errol compares across U.S. station-mapped locations
Errol's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
52 24th percentile score exceeds 24% 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
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 23°F (-5°C) | 1°F (-17°C) | 12°F (-11°C) | 3.0" | 31.0 | 0.0 |
| February | 26°F (-3°C) | -1°F (-18°C) | 13°F (-11°C) | 2.6" | 28.0 | 0.0 |
| March | 36°F (2°C) | 11°F (-11°C) | 23°F (-5°C) | 2.8" | 30.3 | 0.0 |
| April | 49°F (9°C) | 26°F (-3°C) | 37°F (3°C) | 3.5" | 23.0 | 0.0 |
| May | 63°F (17°C) | 39°F (4°C) | 51°F (10°C) | 3.6" | 7.7 | 0.0 |
| June | 72°F (22°C) | 48°F (9°C) | 60°F (16°C) | 4.8" | 1.0 | 0.0 |
| July | 77°F (25°C) | 52°F (11°C) | 65°F (18°C) | 4.1" | 0.0 | 1.0 |
| August | 75°F (24°C) | 50°F (10°C) | 63°F (17°C) | 4.2" | 0.0 | 0.0 |
| September | 68°F (20°C) | 43°F (6°C) | 56°F (13°C) | 3.6" | 4.0 | 0.0 |
| October | 55°F (13°C) | 32°F (0°C) | 44°F (6°C) | 5.1" | 14.8 | 0.0 |
| November | 41°F (5°C) | 23°F (-5°C) | 32°F (0°C) | 3.5" | 26.7 | 0.0 |
| December | 29°F (-1°C) | 10°F (-12°C) | 20°F (-7°C) | 3.8" | 30.5 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 77°F around July 19, short of 90°F on every date, while 198 dates carry a normal low at or below freezing, the coldest -2°F near February 4.
The freezing stretch
The normal low stays at or below 32°F into April 29, then returns to freezing around October 15, covering 198 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.
The widest day
February 21 carries the biggest normal gap between afternoon and dawn, 27°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Errol.
Where Errol Stands Nationally
Winters bite deep and often: the normal nightly low dips to freezing or below on around 198 nights a year, placing this among the most frost-prone tenth of ranked stations.
Errol 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
Errol spreads its precipitation across the year
Neither half of the year dominates here: June through August take 29% of the annual total and December through February 21%, with neither reaching the 35% that would mark a distinct wet season. Errol has no dry season to plan around, though it does carry a wide 52.2°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: October averages 5.1" and February 2.6". The three wettest months together take 31% 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.
Frost Dates & Growing Season
First Fall Freeze
September 22
50% probability date
Last Spring Freeze
May 21
50% probability date
Growing Season
124 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
9,364
Higher = more heating needed
Cooling Degree Days
123
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside NH closest to Errol 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 (40°F here).
- Allenspark, CO 40°F · 0.0°F off
- Argyle, MN 40°F · 0.0°F off
- Drake, ND 40°F · 0.0°F off
- Grand Marais, MN 40°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (44.6" here), excluding temperature-peer places.
- Richlands, VA 44.6" · 0.0" off
- Franklinville, NY 44.6" · 0.0" off
- Wills Point, TX 44.6" · 0.0" off
- Chanute, KS 44.6" · 0.0" off
Data-derived climate profile
How Errol's climate pattern fits together
heating led · moderate · mid swing
Errol's energy balance leans toward cold weather: 9,364 annual heating degree days against 123 for cooling. Its 52.2°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 124 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.
July and January mark the typical warm and cold ends of the calendar in Errol's middle-range seasonal profile. The measured spread is 52.2°F. The annual average is 40°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Errol's 44.6 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Snowfall is not added to the interpretation because its annual value is missing. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from Errol's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Errol, not an official NOAA class or a year-ahead forecast.
Questions about Errol's climate
How much rain does Errol get? ▼
How cold does Errol get in winter? ▼
How much energy does heating and cooling require in Errol? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Errol's primary station: ERROL AP (USC00272846). 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 Errol; 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 Errol 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.