Dumb Hundred, Pennsylvania Weather
Apples hang heavy on the branch. Day 93 of summer. Read this microseason across nine climate regions →
Dumb Hundred weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 10:24 AM EDT · Open-Meteo
- TodaySep 21Rain later58%0.29″66°57°—
- TuesdaySep 22Rain76%1.1″58°54°-8°
- WednesdaySep 23Rain58%0.12″57°50°-1°
- ThursdaySep 24Overcast15%—62°41°+5°
- FridaySep 25Clear——68°41°+6°
- SaturdaySep 26Clear——70°42°+2°
- SundaySep 27Overcast——71°47°+1°
Air quality now AQI 28 · Good
AQI 28 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 5.8 µg/m³, PM10 at 5.9 µg/m³ — typical background levels with no transport signature.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 30. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 30
- UV peak
- 1.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 4
PM × Wind × Precip
PM2.5 at 5.8 µg/m³, PM10 at 5.9 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.98
- Wind
- light
- Recent rain
- 1h in last 6h
- Pattern
- background
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
September dries up ditches or breaks down bridges.
- Moonrise
- 4:47 PM
- Moonset
- 1:31 AM
- In sign
- ♑︎ Capricorn
Apples hang heavy on the branch
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Dumb Hundred at a glance
- Today vs. normal: Today averages 62°F (high 66°F, low 57°F), about the 62°F normal for Sep 21
- Last frost: April 23 (1991–2020 median, NOAA station 8 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, winter squash
16-Day Forecast — Dumb Hundred
- Mon66°57°58%
- Tue58°54°76%
- Wed57°50°58%
- Thu62°41°15%
- Fri68°41°5%
- Sat70°42°6%
- Sun71°47°3%
- Mon74°50°5%
- Tue75°53°10%
- Wed72°54°24%
- Thu73°54°23%
- Fri72°50°16%
- Sat73°50°16%
- Sun67°55°26%
- Mon67°46°24%
- Tue55°40°23%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Fall planting + final harvests
As of September 21, the season's first frost (typically October 21) is approaching. Pick what frost-tender plants still carry before the next cold front. This city's planting calendar for September: plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, and winter squash.
SPC Convective Outlook
Storm Prediction Center — Dumb Hundred
SPC includes Dumb Hundred in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- DAY 3NONENo severe risk
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook.
Sun & seasons in Dumb Hundred
Dumb Hundred sits in Blair County, where the year’s longest day runs 15h 3m of daylight and its shortest just 9h 18m — a swing of +5h 45m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Philadelphia, the state’s largest city, lies about 174 miles to the E. The nearest town Dumb Hundred tracks is West Newton, roughly 72 miles to the W.
Air quality in Dumb Hundred
Air quality in Dumb Hundred’s county has trended cleaner since 2020; its cleanest year on record was 2024 (median AQI 37).
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| April | lettuce, peas, spinach, radishes | radishes |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| July | tomatoes, peppers, beans, squash | lettuce, peas, beans, summer squash, garlic |
| August | beans, squash, fall brassicas, carrots | tomatoes, peppers, beans, summer squash, winter squash |
| September | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash |
| October | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| November | — | fall brassicas, carrots |
A year in weather
Dumb Hundred's warmest month is July (~72°F mean) and its coldest is January (~28°F). Rainfall peaks in September (4.0 inches) and bottoms out in February (1.9 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 28° | 2.2″ | 11 |
| February | 31° | 1.9″ | 10 |
| March | 39° | 3.0″ | 12 |
| April | 50° | 3.3″ | 13 |
| May | 60° | 3.7″ | 14 |
| June | 69° | 3.4″ | 12 |
| July | 72° | 3.5″ | 12 |
| August | 71° | 3.3″ | 11 |
| September | 64° | 4.0″ | 10 |
| October | 53° | 2.9″ | 11 |
| November | 42° | 2.9″ | 10 |
| December | 33° | 2.6″ | 10 |
Regional context
Similar climates Roaring Spring, PA, Ore Hill, PA, East Sharpsburg, PA
Dumb Hundred swings from 28°F in January to 72°F in July (44°F) per NOAA NCEI 1991-2020 normals; precipitation in Dumb Hundred runs about 36.7 inches on roughly 136 measurable days.
Precipitation in Dumb Hundred runs summer-dominant: September averages 4.0 inches across 10.3 days of warm-season storms, while February drops to 1.9 inches over 9.7 rainy days of drier cool air. Dumb Hundred shares that warm-season-wet pattern with places like Roaring Spring, PA, Ore Hill, PA and East Sharpsburg, PA.
Once Dumb Hundred passes April 23, freezes fade and Dumb Hundred's beds take kale, peas, spinach, and parsnips. Tomatoes and peppers do best set out two weeks later in Dumb Hundred, once nights clear the mid-40s°F. By October 21, frost is back in Dumb Hundred — protect or harvest anything tender. Open lawns in Dumb Hundred whiten first when frost returns.
Similar climates: Roaring Spring, PA, Ore Hill, PA, East Sharpsburg, PA, Claysburg, PA, East Freedom, PA.
Frequently asked
- When does it freeze in Dumb Hundred?
- Frost typically leaves Dumb Hundred by April 23 and returns to Dumb Hundred near October 21.
- What is the rainy season in Dumb Hundred?
- September is the wettest month in Dumb Hundred, about 4.0 inches on average; the year totals roughly 37 inches.
- What is the warmest month in Dumb Hundred?
- On average July tops the year in Dumb Hundred at about 72°F.
- What is the coldest month in Dumb Hundred?
- The coldest stretch in Dumb Hundred falls in January, around 28°F on average.
- When can I start a vegetable garden in Dumb Hundred?
- In Dumb Hundred, sow peas and hardy greens around April 23; Dumb Hundred's tomatoes and peppers wait two weeks more.
- How many rainy days does Dumb Hundred get?
- Dumb Hundred records around 136 days of measurable precipitation annually.
- What hardiness zone is Dumb Hundred?
- Because Dumb Hundred bottoms near 28°F in January, that winter low sets Dumb Hundred's USDA zone — verify by ZIP.
- What is the 10-day forecast for Dumb Hundred?
- Dumb Hundred's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Dumb Hundred?
- See this week's day-by-day rain chances for Dumb Hundred in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Dumb Hundred?
- Current conditions for Dumb Hundred and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Dumb Hundred forecast updated?
- The Dumb Hundred forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Dumb Hundred?
- Today's sunrise and sunset times for Dumb Hundred are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Dumb Hundred?
- The next few days in Dumb Hundred's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Dumb Hundred sits at 40.3°N; its climate zone is warm-summer humid continental (Köppen approximation).
ZIP codes in Dumb Hundred
- 16673