Carnot-Moon, Pennsylvania climate: Normal weather by month, frost dates and records
Carnot-Moon's normal year runs from 19°F January nights to 83°F July afternoons, with 41.8 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.5°C, January lows of −7°C, July highs of 28°C, 1,062 mm of precipitation a year.
- NOAA stationMoon Twp
- Station IDUSC00365918
- Location40.53°N 80.22°W
- Elevation1,172 ft (357 m)
- From the centerunder 1 mile
- Population (census place)13,639
On October 14, the normal high in Carnot-Moon is 64°F and the normal low 42°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Carnot-Moon.
- Jan 36° 19°
- Feb 39° 21°
- Mar 49° 28°
- Apr 62° 38°
- May 72° 49°
- Jun 79° 58°
- Jul 83° 62°
- Aug 82° 60°
- Sep 76° 53°
- Oct 63° 41°
- Nov 51° 33°
- Dec 40° 26°
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 Carnot-Moon each month?
July is the warmest month, with normal highs of 83°F; January the coldest, with normal lows of 19°F. The most precipitation falls in June (4.37 in), the least in February (2.59 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 36°F | 19°F | 27.5°F | 3.06 | – | <1 | 28 | 9 h 30 min |
| February | 39°F | 21°F | 30.4°F | 2.59 | – | <1 | 24 | 10 h 40 min |
| March | 49°F | 28°F | 38.1°F | 3.35 | – | <1 | 22 | 11 h 50 min |
| April | 62°F | 38°F | 49.8°F | 3.56 | – | <1 | 8 | 13 h 10 min |
| May | 72°F | 49°F | 60.5°F | 3.96 | – | <1 | <1 | 14 h 20 min |
| June | 79°F | 58°F | 68.6°F | 4.37 | – | 1 | <1 | 15 h |
| July | 83°F | 62°F | 72.6°F | 4.11 | – | 5 | <1 | 14 h 50 min |
| August | 82°F | 60°F | 71.3°F | 3.56 | – | 2 | <1 | 13 h 50 min |
| September | 76°F | 53°F | 64.4°F | 3.81 | – | 1 | <1 | 12 h 30 min |
| October | 63°F | 41°F | 52.2°F | 3.07 | – | <1 | 3 | 11 h 10 min |
| November | 51°F | 33°F | 41.8°F | 3.11 | – | <1 | 17 | 10 h |
| December | 40°F | 26°F | 33.1°F | 3.25 | – | <1 | 23 | 9 h 20 min |
| Year (annual) | 61°F | 41°F | 50.9°F | 41.80 | – | 10 | 124 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 2°C | −7°C | −2.5°C | 78 mm |
| February | 4°C | −6°C | −0.9°C | 66 mm |
| March | 9°C | −2°C | 3.4°C | 85 mm |
| April | 17°C | 3°C | 9.9°C | 90 mm |
| May | 22°C | 10°C | 15.8°C | 101 mm |
| June | 26°C | 15°C | 20.3°C | 111 mm |
| July | 28°C | 17°C | 22.6°C | 104 mm |
| August | 28°C | 16°C | 21.8°C | 90 mm |
| September | 24°C | 12°C | 18.0°C | 97 mm |
| October | 17°C | 5°C | 11.2°C | 78 mm |
| November | 10°C | 0°C | 5.4°C | 79 mm |
| December | 5°C | −3°C | 0.6°C | 83 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Glenwillard Dashields Lock and Dam (1 miles away), gets 20 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00365918; 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 Carnot-Moon?
Normal highs sit between 65°F and 85°F in May, June, July, August and September.
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 USC00365918.
When is the last frost in Carnot-Moon?
In Carnot-Moon, the last spring frost (32°F) comes after April 28 in half of years and after May 15 in one year in ten; the first autumn frost comes before October 18 in half of years and before October 5 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
- April 281 year in 10 after May 15; 9 in 10 after April 15
- First autumn frost, half of years before
- October 181 year in 10 before October 5; 9 in 10 before November 4
NOAA puts the median frost-free season at 172 days, and the season without a hard freeze (28°F) at 195 days.
A hard freeze (28°F) comes after April 17 in half of springs and before October 31 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Carnot-Moon in zone 6b in ZIP code 15108.
Frost dates for every NOAA station in Pennsylvania · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00365918; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 Carnot-Moon?
In a normal year in Carnot-Moon, 10 days a year reach 90°F and 124 nights fall to 32°F or colder.
- Days at 90°F or more
- 10a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 124a normal year
- Days that stay below freezing
- 33high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00365918.
How sunny is Carnot-Moon?
Over a year 69% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Carnot-Moon, 3.8 kWh per square metre a day. August is the sunniest month (78%) and December the cloudiest (52%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 53% | 1.6 |
| February | 59% | 2.4 |
| March | 61% | 3.4 |
| April | 67% | 4.6 |
| May | 70% | 5.4 |
| June | 74% | 5.9 |
| July | 77% | 5.9 |
| August | 78% | 5.3 |
| September | 76% | 4.3 |
| October | 67% | 2.9 |
| November | 65% | 2.0 |
| December | 52% | 1.3 |
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 Carnot-Moon need?
A normal year in Carnot-Moon brings 5,848 heating degree days, 9% more than the median U.S. place (5,373), and 727 cooling degree days, 20% 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 3,032 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,162 | 0 |
| February | 970 | 0 |
| March | 833 | 1 |
| April | 460 | 4 |
| May | 187 | 48 |
| June | 28 | 137 |
| July | 6 | 241 |
| August | 8 | 202 |
| September | 102 | 84 |
| October | 405 | 10 |
| November | 698 | 0 |
| December | 989 | 0 |
| Year (annual) | 5,848 | 727 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00365918. 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 Carnot-Moon been warmer than normal lately?
2025 averaged 51.6°F, 0.7°F above the 1991-2020 normal of 50.9°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 52.8°F | +1.9°F | 43.54 |
| 2022 | 51.1°F | +0.2°F | 45.15 |
| 2023 | 53.0°F | +2.1°F | 41.31 |
| 2024 | 54.2°F | +3.3°F | 44.54 |
| 2025 | 51.6°F | +0.7°F | 38.62 |
Source: observed years: ACIS, station USC00365918. A year counts only with all twelve months complete.
How does Carnot-Moon's climate compare?
Carnot-Moon is warmer than 56 of the other 107 places with their own NOAA record in Pennsylvania, and wetter than 24. Across the 7,247 U.S. stations with normals, its annual mean of 50.9°F is warmer than 44%.
In the Köppen classification computed from these normals, Carnot-Moon is Dfa: continental, no dry season, hot 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 Carnot-Moon share this climate record?
Coraopolis has no NOAA station with 1991-2020 normals of its 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.
- Coraopolis, PA5,340 people · 3 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 Carnot-Moon's climate
What is the coldest month in Carnot-Moon?
January, with a normal high of 36°F and a normal low of 19°F. The warmest is July (83°F by day, 62°F at night).
Does it snow in Carnot-Moon?
Yes. NOAA publishes no 1991-2020 snowfall normal for Carnot-Moon's NOAA station; the nearest record that keeps one, Glenwillard Dashields Lock and Dam (1 miles away), records 20 inches of snow in a normal year.
What is the rainiest month in Carnot-Moon?
June, with 4.37 in of precipitation in a normal year; the driest is February with 2.59 in.
What plant hardiness zone is Carnot-Moon in?
The USDA's 2023 map puts Carnot-Moon in zone 6b in ZIP code 15108.
How late can frost come in Carnot-Moon?
In half of years the last 32°F night comes after April 28; in one year in ten it comes after May 15. Waiting until May 15 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Pennsylvania climateThe statewide normals and every place in the state
- Glenwillard Dashields Lock and Dam, PA1 miles from this station, 51.7°F a year
- Pittsburgh, PA3 miles from this station, 51.8°F a year
- Emsworth, PA7 miles from this station, 52.6°F a year
- Montgomery Lock and Dam, PA12 miles from this station, 50.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made