Oswayo, Pennsylvania climate: Normal weather by month, frost dates and records
Oswayo's normal year runs from 11°F January nights to 79°F July afternoons, with 43.1 inches of precipitation and 60 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.7°C, January lows of −12°C, July highs of 26°C, 1,096 mm of precipitation a year.
- NOAA stationOswayo (1 mi ENE)
- Station IDUSC00366649
- Location41.92°N 78.01°W
- Elevation1,710 ft (521 m)
- Population130
On October 23, the normal high in Oswayo is 56°F and the normal low 33°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 Oswayo.
- Jan 30° 11°
- Feb 33° 12°
- Mar 42° 19°
- Apr 55° 29°
- May 68° 40°
- Jun 75° 50°
- Jul 79° 53°
- Aug 78° 52°
- Sep 71° 45°
- Oct 59° 35°
- Nov 46° 26°
- Dec 35° 19°
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 Oswayo each month?
July is the warmest month, with normal highs of 79°F; January the coldest, with normal lows of 11°F. The most precipitation falls in July (4.62 in), the least in February (2.15 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 30°F | 11°F | 20.7°F | 2.90 | 14.1 | 15 | <1 | 29 | 9 h 30 min |
| February | 33°F | 12°F | 22.3°F | 2.15 | 12.3 | 13 | <1 | 27 | 10 h 30 min |
| March | 42°F | 19°F | 30.6°F | 2.96 | 11.3 | 14 | <1 | 27 | 11 h 50 min |
| April | 55°F | 29°F | 42.1°F | 3.72 | 1.9 | 13 | <1 | 19 | 13 h 20 min |
| May | 68°F | 40°F | 53.8°F | 3.66 | 0.2 | 14 | <1 | 6 | 14 h 30 min |
| June | 75°F | 50°F | 62.5°F | 4.37 | 0.0 | 14 | <1 | <1 | 15 h 10 min |
| July | 79°F | 53°F | 65.9°F | 4.62 | 0.0 | 12 | 1 | <1 | 15 h |
| August | 78°F | 52°F | 64.6°F | 4.15 | 0.0 | 12 | <1 | <1 | 14 h |
| September | 71°F | 45°F | 57.6°F | 4.28 | 0.0 | 12 | <1 | 2 | 12 h 30 min |
| October | 59°F | 35°F | 46.9°F | 4.01 | 0.7 | 14 | <1 | 13 | 11 h 10 min |
| November | 46°F | 26°F | 35.8°F | 3.24 | 5.1 | 13 | <1 | 23 | 9 h 50 min |
| December | 35°F | 19°F | 26.9°F | 3.08 | 14.7 | 16 | <1 | 28 | 9 h 10 min |
| Year (annual) | 56°F | 33°F | 44.1°F | 43.14 | 60.3 | 164 | 2 | 175 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −1°C | −12°C | −6.3°C | 74 mm | 36 cm |
| February | 1°C | −11°C | −5.4°C | 55 mm | 31 cm |
| March | 6°C | −7°C | −0.8°C | 75 mm | 29 cm |
| April | 13°C | −2°C | 5.6°C | 94 mm | 5 cm |
| May | 20°C | 5°C | 12.1°C | 93 mm | 1 cm |
| June | 24°C | 10°C | 16.9°C | 111 mm | 0 cm |
| July | 26°C | 12°C | 18.8°C | 117 mm | 0 cm |
| August | 25°C | 11°C | 18.1°C | 105 mm | 0 cm |
| September | 21°C | 7°C | 14.2°C | 109 mm | 0 cm |
| October | 15°C | 2°C | 8.3°C | 102 mm | 2 cm |
| November | 8°C | −4°C | 2.1°C | 82 mm | 13 cm |
| December | 2°C | −7°C | −2.8°C | 78 mm | 37 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00366649; 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 Oswayo?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, August 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 USC00366649.
When is the last frost in Oswayo?
In Oswayo, the last spring frost (32°F) comes after May 20 in half of years and after June 2 in one year in ten; the first autumn frost comes before September 29 in half of years and before September 14 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 201 year in 10 after June 2; 9 in 10 after May 5
- First autumn frost, half of years before
- September 291 year in 10 before September 14; 9 in 10 before October 10
NOAA puts the median frost-free season at 130 days, and the season without a hard freeze (28°F) at 153 days.
A hard freeze (28°F) comes after May 6 in half of springs and before October 9 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Oswayo in zone 5b in ZIP code 16748, the nearest ZIP area.
Frost dates for every NOAA station in Pennsylvania · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00366649; 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 Oswayo?
In a normal year in Oswayo, 2 days a year reach 90°F, 175 nights fall to 32°F or colder and 164 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
- 175a normal year
- Days that stay below freezing
- 55high of 32°F or less
- Days with 0.01 inch of precipitation
- 164a normal year
- Days with 1 inch of snow or more
- 22a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00366649.
How sunny is Oswayo?
Over a year 67% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Oswayo, 3.6 kWh per square metre a day. August is the sunniest month (75%) and December the cloudiest (50%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 54% | 1.5 |
| February | 58% | 2.3 |
| March | 61% | 3.3 |
| April | 65% | 4.5 |
| May | 67% | 5.2 |
| June | 71% | 5.8 |
| July | 75% | 5.8 |
| August | 75% | 5.2 |
| September | 72% | 4.1 |
| October | 63% | 2.7 |
| November | 61% | 1.8 |
| December | 50% | 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 Oswayo need?
A normal year in Oswayo brings 7,781 heating degree days, 45% more than the median U.S. place (5,373), and 210 cooling degree days, 77% 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 1,860 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,375 | 0 |
| February | 1,196 | 0 |
| March | 1,066 | 0 |
| April | 687 | 0 |
| May | 357 | 9 |
| June | 117 | 42 |
| July | 54 | 82 |
| August | 72 | 59 |
| September | 238 | 17 |
| October | 563 | 0 |
| November | 876 | 0 |
| December | 1,181 | 0 |
| Year (annual) | 7,781 | 210 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00366649. 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.
How does Oswayo's climate compare?
Oswayo is warmer than 0 of the other 107 places with their own NOAA record in Pennsylvania, and wetter than 40. Across the 7,247 U.S. stations with normals, its annual mean of 44.1°F is warmer than 16%.
In the Köppen classification computed from these normals, Oswayo 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 Oswayo 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.
- Bolivar, NY1,001 people · 13 mi NW
- Stannards, NY606 people · 11 mi NE
- Richburg, NY406 people · 14 mi NW
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 Oswayo's climate
What is the coldest month in Oswayo?
January, with a normal high of 30°F and a normal low of 11°F. The warmest is July (79°F by day, 53°F at night).
Does it snow in Oswayo?
Yes: 60 inches in a normal year, falling on 37 days with 0.1 inch or more, the most in December (14.7 inches).
What is the rainiest month in Oswayo?
July, with 4.62 in of precipitation in a normal year; the driest is February with 2.15 in.
What plant hardiness zone is Oswayo in?
The USDA's 2023 map puts Oswayo in zone 5b in ZIP code 16748, the nearest ZIP area.
How late can frost come in Oswayo?
In half of years the last 32°F night comes after May 20; in one year in ten it comes after June 2. Waiting until June 2 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Pennsylvania climateThe statewide normals and every place in the state
- Coudersport, PA12 miles from this station, 45.1°F a year
- Wellsville, NY13 miles from this station, 46.4°F a year
- Port Allegany, PA16 miles from this station, 45.8°F a year
- Olean, NY25 miles from this station, 46.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made