DuBois, Pennsylvania climate: Normal weather by month, frost dates and records
DuBois's normal year runs from 17°F January nights to 79°F July afternoons, with 42.4 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.7°C, January lows of −8°C, July highs of 26°C, 1,077 mm of precipitation a year.
- NOAA stationDubois Jefferson County Airport
- Station IDUSW00004787
- Location41.18°N 78.90°W
- Elevation1,814 ft (553 m)
- From the center8 miles
- Population7,302
On October 14, the normal high in DuBois is 60°F and the normal low 41°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 DuBois.
- Jan 32° 17°
- Feb 35° 19°
- Mar 44° 26°
- Apr 58° 37°
- May 68° 47°
- Jun 75° 55°
- Jul 79° 59°
- Aug 78° 58°
- Sep 71° 51°
- Oct 59° 41°
- Nov 47° 32°
- Dec 36° 23°
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 DuBois each month?
July is the warmest month, with normal highs of 79°F; January the coldest, with normal lows of 17°F. The most precipitation falls in June (4.66 in), the least in February (2.38 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 32°F | 17°F | 24.5°F | 2.93 | 14 | <1 | 28 | 9 h 30 min |
| February | 35°F | 19°F | 26.8°F | 2.38 | 13 | <1 | 25 | 10 h 40 min |
| March | 44°F | 26°F | 35.2°F | 3.26 | 14 | <1 | 23 | 11 h 50 min |
| April | 58°F | 37°F | 47.2°F | 3.72 | 15 | <1 | 11 | 13 h 20 min |
| May | 68°F | 47°F | 57.4°F | 3.69 | 15 | <1 | 2 | 14 h 30 min |
| June | 75°F | 55°F | 65.1°F | 4.66 | 15 | <1 | <1 | 15 h 10 min |
| July | 79°F | 59°F | 69.1°F | 4.36 | 14 | 1 | <1 | 14 h 50 min |
| August | 78°F | 58°F | 67.7°F | 3.89 | 14 | 1 | <1 | 13 h 50 min |
| September | 71°F | 51°F | 61.0°F | 3.96 | 13 | <1 | <1 | 12 h 30 min |
| October | 59°F | 41°F | 50.1°F | 3.40 | 15 | <1 | 6 | 11 h 10 min |
| November | 47°F | 32°F | 39.2°F | 3.21 | 14 | <1 | 17 | 10 h |
| December | 36°F | 23°F | 29.8°F | 2.96 | 14 | <1 | 27 | 9 h 10 min |
| Year (annual) | 57°F | 39°F | 47.7°F | 42.42 | 169 | 2 | 138 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 0°C | −8°C | −4.2°C | 74 mm |
| February | 2°C | −7°C | −2.9°C | 60 mm |
| March | 7°C | −3°C | 1.8°C | 83 mm |
| April | 14°C | 3°C | 8.4°C | 94 mm |
| May | 20°C | 8°C | 14.1°C | 94 mm |
| June | 24°C | 13°C | 18.4°C | 118 mm |
| July | 26°C | 15°C | 20.6°C | 111 mm |
| August | 26°C | 14°C | 19.8°C | 99 mm |
| September | 22°C | 11°C | 16.1°C | 101 mm |
| October | 15°C | 5°C | 10.1°C | 86 mm |
| November | 8°C | 0°C | 4.0°C | 82 mm |
| December | 2°C | −5°C | −1.2°C | 75 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Ridgway (18 miles away), gets 53 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00004787; 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 DuBois?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September has the fewest days with rain (13).
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 USW00004787.
When is the last frost in DuBois?
In DuBois, the last spring frost (32°F) comes after May 6 in half of years and after May 23 in one year in ten; the first autumn frost comes before October 14 in half of years and before September 29 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 23; 9 in 10 after April 19
- First autumn frost, half of years before
- October 141 year in 10 before September 29; 9 in 10 before November 1
NOAA puts the median frost-free season at 160 days, and the season without a hard freeze (28°F) at 186 days.
A hard freeze (28°F) comes after April 24 in half of springs and before October 28 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts DuBois in zone 6a in ZIP code 15801, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, DuBois's NOAA station is in zone 6a: the coldest night of a typical year reaches −6°F (24 complete years).
Frost dates for every NOAA station in Pennsylvania · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00004787; 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 in DuBois?
In a normal year in DuBois, 2 days a year reach 90°F, 138 nights fall to 32°F or colder and 169 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
- 138a normal year
- Days that stay below freezing
- 53high of 32°F or less
- Days with 0.01 inch of precipitation
- 169a normal year
The highest temperature in this station's record (since 1962) is 101°F, on July 22, 2011; the lowest is −26°F, on January 19, 1994.
The wettest calendar year on that record is 1972, with 56.48 in; the snowiest season is 1970–71, with 99.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00004787; records: ACIS (NOAA Regional Climate Centers), station USW00004787. Records use complete months only; a month missing more than three days is left out.
How humid and windy is DuBois, and how clear are its skies?
The summer (June-August) dew point averages 58°F. The muggiest month is July, with an average dew point of 60°F; the driest air comes in January (17°F). January is the windiest month (10.1 mph on average), and June has the most clear or nearly clear hours (70%).
| Month | Dew point | Humidity | Afternoon humidity | Wind | Clear or few clouds | Overcast |
|---|---|---|---|---|---|---|
| January | 17°F | 72% | 63% | 10.1 mph | – | – |
| February | 20°F | 68% | 56% | 9.8 mph | – | – |
| March | 29°F | 62% | 48% | 9.2 mph | – | – |
| April | 38°F | 59% | 44% | 8.6 mph | – | – |
| May | 51°F | 70% | 53% | 6.9 mph | – | – |
| June | 59°F | 73% | 56% | 6.2 mph | 70% | 15% |
| July | 60°F | 74% | 56% | 5.8 mph | – | – |
| August | 57°F | 74% | 54% | 5.9 mph | – | – |
| September | 48°F | 75% | 57% | 7.1 mph | – | – |
| October | 35°F | 70% | 55% | 8.5 mph | – | – |
| November | 27°F | 73% | 64% | 9.7 mph | – | – |
| December | 21°F | 76% | 68% | 10.0 mph | – | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00004787. Monthly averages of all hours; afternoon humidity at 3 p.m. local standard time; sky as the share of hours NOAA's observations rate clear or few clouds (a dash where NOAA publishes no sky value).
How sunny is DuBois?
Over a year 67% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around DuBois, 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 DuBois need?
A normal year in DuBois brings 6,673 heating degree days, 24% more than the median U.S. place (5,373), and 413 cooling degree days, 54% 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 2,428 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,257 | 0 |
| February | 1,071 | 0 |
| March | 926 | 0 |
| April | 539 | 4 |
| May | 264 | 28 |
| June | 74 | 77 |
| July | 20 | 145 |
| August | 32 | 117 |
| September | 159 | 39 |
| October | 468 | 5 |
| November | 774 | 0 |
| December | 1,091 | 0 |
| Year (annual) | 6,673 | 413 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00004787. 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 DuBois been warmer than normal lately?
2025 averaged 49.0°F, 1.3°F above the 1991-2020 normal of 47.7°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 50.5°F | +2.8°F | 39.12 |
| 2022 | 49.4°F | +1.6°F | 41.16 |
| 2023 | 51.9°F | +4.2°F | 39.83 |
| 2024 | 52.6°F | +4.9°F | 41.77 |
| 2025 | 49.0°F | +1.3°F | 31.67 |
Over 53 complete years from 1963 to 2025, the station's annual mean temperature rose at a fitted 5.6°F per century (+0.31°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USW00004787; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does DuBois's climate compare?
DuBois is warmer than 23 of the other 107 places with their own NOAA record in Pennsylvania, and wetter than 34. Across the 7,247 U.S. stations with normals, its annual mean of 47.7°F is warmer than 31%.
In the Köppen classification computed from these normals, DuBois 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 DuBois share this climate record?
10 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.
- Treasure Lake, PA5,513 people · 9 mi E
- Brookville, PA3,899 people · 10 mi W
- Reynoldsville, PA2,482 people · 6 mi S
- Brockway, PA2,226 people · 7 mi NE
- Oklahoma, PA1,303 people · 10 mi SE
- Sykesville, PA1,082 people · 10 mi SE
- Falls Creek, PA1,006 people · 5 mi SE
- Sandy, PA853 people · 8 mi SE
- Big Run, PA622 people · 14 mi S
- Crenshaw, PA217 people · 9 mi NE
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 DuBois's climate
What is the coldest month in DuBois?
January, with a normal high of 32°F and a normal low of 17°F. The warmest is July (79°F by day, 59°F at night).
Does it snow in DuBois?
Yes. NOAA publishes no 1991-2020 snowfall normal for DuBois's NOAA station; the nearest record that keeps one, Ridgway (18 miles away), records 53 inches of snow in a normal year.
What is the rainiest month in DuBois?
June, with 4.66 in of precipitation in a normal year; the driest is February with 2.38 in.
What plant hardiness zone is DuBois in?
The USDA's 2023 map puts DuBois in zone 6a in ZIP code 15801, the nearest ZIP area. By the same method at DuBois's NOAA station, the coldest night of a typical year reaches −6°F (24 years, 1991-2020): zone 6a.
How late can frost come in DuBois?
In half of years the last 32°F night comes after May 6; in one year in ten it comes after May 23. Waiting until May 23 leaves about a one-in-ten chance of a later frost.
Nearby and next
- DuBois in OctoberThis month day by day, its records and recent years
- Pennsylvania climateThe statewide normals and every place in the state
- Ridgway, PA19 miles from this station, 47.6°F a year
- Cooksburg (2 mi NW), PA21 miles from this station, 46.0°F a year
- Grampian, PA22 miles from this station, 47.1°F a year
- Putneyville 2 SE Dam, PA27 miles from this station, 48.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made