York, Pennsylvania Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
York weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Mostly Clear——84°52°—
- ThursdayJun 4Overcast——88°58°+4°
- FridayJun 5Overcast——85°60°-3°
- SaturdayJun 6Overcast27%—85°63°0°
- SundayJun 7Light Showers49%—84°64°-1°
- MondayJun 8Overcast14%—74°55°-10°
- TuesdayJun 9Partly Cloudy11%—77°47°+3°
Ozone at AQI 39 now. AQI up 6 over the last 6 hours (gradual rise). With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 7 by mid-afternoon.
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 39 now. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 7 by mid-afternoon.
- Present
- AQI 39
- UV peak
- 0.0 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 7
PM × Wind × Precip
PM2.5 at 5.6 µg/m³ (AQI 31) with a 0.98 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.98
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 3:35 AM
- Moonset
- 1:07 PM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
York at a glance
- Today vs. normal: 4°F below the seasonal normal for this latitude
- Last frost: April 16 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
July ranks as York's warmest month with mean temperatures around 75°F, while January stands as the coldest at roughly 31°F. September brings peak rainfall at 5.1 inches, contrasting with February's modest 2.8 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 31° | 3.3″ | 6 |
| February | 34° | 2.8″ | 6 |
| March | 42° | 4.0″ | 7 |
| April | 54° | 3.6″ | 7 |
| May | 63° | 4.2″ | 8 |
| June | 71° | 4.3″ | 7 |
| July | 75° | 4.5″ | 7 |
| August | 74° | 4.0″ | 6 |
| September | 67° | 5.1″ | 6 |
| October | 56° | 3.9″ | 5 |
| November | 44° | 3.2″ | 6 |
| December | 36° | 3.5″ | 7 |
Regional context
York falls within the warm-summer humid continental climate region, sharing temperature ranges, seasonal rhythms, and growing conditions with other cities in this climate category.
Similar climates: Philadelphia, PA, Pittsburgh, PA, Allentown, PA, Harrisburg, PA, Lancaster, PA.
Naturalist notes
Late May brings the characteristic evening chorus of American robins establishing territory, their liquid songs echoing through York's neighborhoods at dusk.
Dandelion seed heads begin dispersing in early June, sending their parachute-like seeds drifting across lawns and fields on warm afternoon breezes.
Frequently asked
- When does it freeze in York?
- York's final spring frost usually occurs around mid-April, while the season's first fall frost typically arrives around mid-November.
- What is the rainy season in York?
- September stands as the wettest month, delivering about 5.1 inches of rain on average, while the city accumulates roughly 46 inches annually.
- What is the warmest month in York?
- July typically records the highest temperatures, with averages around 75°F.
- What is the coldest month in York?
- January usually brings the year's coldest weather, averaging about 31°F.
- When can I start a vegetable garden in York?
- Cool-season crops like peas and lettuce can go into the ground around the last spring frost in mid-April, while warm-season varieties such as tomatoes and peppers should wait 1–2 weeks after.
- How many rainy days does York get?
- York experiences approximately 79 rainy days per year.
- What hardiness zone is York?
- York's USDA hardiness zone depends on average minimum winter temperatures; the USDA's online lookup tool can provide the current zone designation using the city ZIP code.
Climate
York, Pennsylvania experiences a warm-summer humid continental climate zone. Winter temperatures in January typically hover near 31°F, while July brings averages around 75°F — creating a 44°F seasonal swing.
Throughout the year, York collects about 46 inches of precipitation distributed across roughly 79 rainy days.
Weather patterns follow the city's latitude at 40.0°N, along with influences from nearby water bodies and local elevation. These factors determine which plants thrive, when frost threatens, and how daily weather unfolds through the seasons.