Topsfield 2, Maine climate: Climate normals at a NOAA weather station
Topsfield 2's normal year runs from 7°F January nights to 78°F July afternoons, with 52.1 inches of precipitation and 115 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.1°C, January lows of −14°C, July highs of 26°C, 1,324 mm of precipitation a year.
- NOAA stationTopsfield 2
- Station IDUSC00178792
- Location45.44°N 67.72°W
- Elevation620 ft (189 m)
On October 23, the normal high in Topsfield 2 is 53°F and the normal low 35°F, and the chance of measurable rain or snow is 42%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Topsfield 2.
- Jan 25° 7°
- Feb 29° 9°
- Mar 37° 18°
- Apr 51° 30°
- May 65° 41°
- Jun 73° 50°
- Jul 78° 57°
- Aug 77° 56°
- Sep 69° 48°
- Oct 56° 37°
- Nov 43° 27°
- Dec 31° 15°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Topsfield 2 each month?
July is the warmest month, with normal highs of 78°F; January the coldest, with normal lows of 7°F. The most precipitation falls in October (5.39 in), the least in August (3.44 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 25°F | 7°F | 15.6°F | 4.13 | 23.6 | 12 | <1 | 30 | 9 h |
| February | 29°F | 9°F | 18.8°F | 3.62 | 27.4 | 12 | <1 | 28 | 10 h 20 min |
| March | 37°F | 18°F | 27.4°F | 4.54 | 19.6 | 12 | <1 | 30 | 11 h 50 min |
| April | 51°F | 30°F | 40.6°F | 4.21 | 9.6 | 13 | <1 | 20 | 13 h 30 min |
| May | 65°F | 41°F | 52.9°F | 4.23 | 0.8 | 15 | <1 | 2 | 14 h 50 min |
| June | 73°F | 50°F | 61.6°F | 4.23 | 0.0 | 14 | <1 | <1 | 15 h 40 min |
| July | 78°F | 57°F | 67.6°F | 3.84 | 0.0 | 13 | <1 | <1 | 15 h 20 min |
| August | 77°F | 56°F | 66.7°F | 3.44 | 0.0 | 11 | <1 | <1 | 14 h 10 min |
| September | 69°F | 48°F | 58.3°F | 4.01 | 0.0 | 10 | <1 | <1 | 12 h 40 min |
| October | 56°F | 37°F | 46.4°F | 5.39 | 1.0 | 13 | <1 | 8 | 11 h |
| November | 43°F | 27°F | 35.0°F | 5.29 | 8.4 | 12 | <1 | 23 | 9 h 30 min |
| December | 31°F | 15°F | 23.2°F | 5.20 | 24.3 | 14 | <1 | 30 | 8 h 40 min |
| Year (annual) | 53°F | 33°F | 42.9°F | 52.13 | 114.7 | 150 | 2 | 170 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −4°C | −14°C | −9.1°C | 105 mm | 60 cm |
| February | −2°C | −13°C | −7.3°C | 92 mm | 70 cm |
| March | 3°C | −8°C | −2.6°C | 115 mm | 50 cm |
| April | 11°C | −1°C | 4.8°C | 107 mm | 24 cm |
| May | 18°C | 5°C | 11.6°C | 107 mm | 2 cm |
| June | 23°C | 10°C | 16.4°C | 107 mm | 0 cm |
| July | 26°C | 14°C | 19.8°C | 98 mm | 0 cm |
| August | 25°C | 13°C | 19.3°C | 87 mm | 0 cm |
| September | 20°C | 9°C | 14.6°C | 102 mm | 0 cm |
| October | 13°C | 3°C | 8.0°C | 137 mm | 3 cm |
| November | 6°C | −3°C | 1.7°C | 134 mm | 21 cm |
| December | 0°C | −9°C | −4.9°C | 132 mm | 62 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00178792; 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.
Which months are mildest at Topsfield 2?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, September has the fewest days with rain (10).
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 USC00178792.
When is the last frost at Topsfield 2?
In Topsfield 2, the last spring frost (32°F) comes after May 6 in half of years and after May 18 in one year in ten; the first autumn frost comes before October 8 in half of years and before September 28 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 61 year in 10 after May 18; 9 in 10 after April 26
- First autumn frost, half of years before
- October 81 year in 10 before September 28; 9 in 10 before October 22
NOAA puts the median frost-free season at 155 days, and the season without a hard freeze (28°F) at 179 days.
A hard freeze (28°F) comes after April 25 in half of springs and before October 21 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Topsfield 2 in zone 5a in ZIP code 04492, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 5b: the coldest night of a typical year reaches −13°F (21 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 Maine · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00178792; 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 at Topsfield 2?
In a normal year in Topsfield 2, 2 days a year reach 90°F, 170 nights fall to 32°F or colder and 150 days bring measurable precipitation.
- Days at 90°F or more
- 2a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 170a normal year
- Days that stay below freezing
- 70high of 32°F or less
- Days with 0.01 inch of precipitation
- 150a normal year
- Days with 1 inch of snow or more
- 30a normal year
The highest temperature in this station's record (since 2000) is 99°F, on August 13, 2025; the lowest is −24°F, on February 4, 2023.
The wettest calendar year on that record is 2005, with 70.23 in; the snowiest season is 2007–08, with 159.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00178792; records: ACIS (NOAA Regional Climate Centers), station USC00178792. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Topsfield 2?
Over a year 68% of the sunlight that would reach the ground under clear skies gets through the clouds at Topsfield 2, 3.5 kWh per square metre a day. September is the sunniest month (74%) and December the cloudiest (60%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 66% | 1.5 |
| February | 67% | 2.4 |
| March | 67% | 3.5 |
| April | 65% | 4.4 |
| May | 65% | 5.1 |
| June | 67% | 5.5 |
| July | 72% | 5.6 |
| August | 74% | 5.0 |
| September | 74% | 4.0 |
| October | 66% | 2.5 |
| November | 61% | 1.5 |
| December | 60% | 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 many heating and cooling degree days does Topsfield 2 record?
A normal year at Topsfield 2 brings 8,298 heating degree days, 54% more than the median U.S. place (5,373), and 259 cooling degree days, 71% 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 1,878 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,533 | 0 |
| February | 1,292 | 0 |
| March | 1,166 | 0 |
| April | 732 | 0 |
| May | 380 | 6 |
| June | 137 | 34 |
| July | 30 | 110 |
| August | 39 | 90 |
| September | 220 | 19 |
| October | 577 | 0 |
| November | 899 | 0 |
| December | 1,294 | 0 |
| Year (annual) | 8,298 | 259 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00178792. 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.
Have recent years at Topsfield 2 been warmer than normal?
2025 averaged 43.8°F, 0.9°F above the 1991-2020 normal of 42.9°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 45.2°F | +2.3°F | 47.88 | 67.1 |
| 2022 | 44.5°F | +1.6°F | 57.37 | 102.6 |
| 2023 | 45.2°F | +2.3°F | 54.35 | 102.8 |
| 2024 | 45.7°F | +2.8°F | 43.30 | 82.4 |
| 2025 | 43.8°F | +0.9°F | 41.20 | 83.6 |
Source: observed years: ACIS, station USC00178792. A year counts only with all twelve months complete.
How does Topsfield 2's climate compare?
Topsfield 2 is warmer than 14 of the 42 places with their own NOAA record in Maine, and wetter than 40. Across the 7,247 U.S. stations with normals, its annual mean of 42.9°F is warmer than 12%.
In the Köppen classification computed from these normals, Topsfield 2 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.
Questions about Topsfield 2's climate
What is the coldest month at Topsfield 2?
January, with a normal high of 25°F and a normal low of 7°F. The warmest is July (78°F by day, 57°F at night).
Does it snow at Topsfield 2?
Yes: 115 inches in a normal year, falling on 46 days with 0.1 inch or more, the most in February (27.4 inches).
What is the rainiest month at Topsfield 2?
October, with 5.39 in of precipitation in a normal year; the driest is August with 3.44 in.
What plant hardiness zone is Topsfield 2 in?
The USDA's 2023 map puts Topsfield 2 in zone 5a in ZIP code 04492, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −13°F (21 years, 1991-2020): zone 5b.
How late can frost come at Topsfield 2?
In half of years the last 32°F night comes after May 6; in one year in ten it comes after May 18. Waiting until May 18 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Maine climateThe statewide normals and every place in the state
- Vanceboro, ME17 miles from this station, 42.7°F a year
- Danforth, ME17 miles from this station, 40.9°F a year
- Grand Lake Stream, ME18 miles from this station, 44.0°F a year
- Woodland, ME25 miles from this station, 46.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made