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Williamsport weather forecast

Pennsylvania, United States · New_York time · 41.24°, -77.00°

Current conditions · 8:15 AM local

Current conditions in Williamsport

64°F

Partly cloudy

Feels like 61°F

Humidity
88%
Wind
4 mph WSW
Gusts
11 mph
UV index
0
Visibility
9.1 mi

Right now

Williamsport is currently seeing partly cloudy, with 18 °C on the thermometer. It feels close to the actual reading at 18 °C. Wind is from the WSW at 7 km/h. Humidity stands at 84% with sea-level pressure near 1013 hPa.

At a glance

Today

82° / 56°

Fog

Tomorrow

86° / 63°

Moderate rain · rain likely (85%)

Upcoming · to Saturday

86° / 52°

Highs 86°, lows 52°. The most active day looks like Tuesday, when rain chances peak at 74%.

Next 3 days

Today looks like fog; temperatures run from 13 °C up to 28 °C. Expect moderate rain tomorrow, between 17 °C and 30 °C. Rain chance peaks at 85% with around 4.7 mm possible. Expect light drizzle Tuesday, between 16 °C and 26 °C. Rain chance peaks at 74% with around 0.9 mm possible.

Today

Sun, Jun 21

Fog

82°56°

Rain chance
9%
Precip
0 in
Max wind
8 mph

Tomorrow

Mon, Jun 22

Moderate rain

86°63°

Rain chance
85%
Precip
0.2 in
Max wind
12 mph

Tuesday

Tue, Jun 23

Light drizzle

80°60°

Rain chance
74%
Precip
0 in
Max wind
11 mph

Next 48 hours

  1. 12 AM60°9%3 mph
  2. 1 AM59°2%2 mph
  3. 2 AM58°0%4 mph
  4. 3 AM57°1%3 mph
  5. 4 AM56°2%2 mph
  6. 5 AM56°1%2 mph
  7. 6 AM56°0%3 mph
  8. 7 AM59°0%2 mph
  9. 8 AM63°0%5 mph
  10. 9 AM67°0%6 mph
  11. 10 AM72°0%6 mph
  12. 11 AM75°0%7 mph
  13. 12 PM77°0%8 mph
  14. 1 PM79°0%6 mph
  15. 2 PM81°0%7 mph
  16. 3 PM82°0%7 mph
  17. 4 PM82°0%7 mph
  18. 5 PM82°0%7 mph
  19. 6 PM82°0%7 mph
  20. 7 PM81°0%5 mph
  21. 8 PM78°0%4 mph
  22. 9 PM73°0%3 mph
  23. 10 PM71°0%1 mph
  24. 11 PM70°0%1 mph
  25. 12 AM68°1%2 mph
  26. 1 AM66°1%4 mph
  27. 2 AM66°1%4 mph
  28. 3 AM65°2%4 mph
  29. 4 AM64°3%6 mph
  30. 5 AM63°3%6 mph
  31. 6 AM64°6%5 mph
  32. 7 AM67°11%5 mph
  33. 8 AM70°22%6 mph
  34. 9 AM69°42%9 mph
  35. 10 AM69°48%6 mph
  36. 11 AM69°54%5 mph
  37. 12 PM67°59%9 mph
  38. 1 PM70°49%7 mph
  39. 2 PM81°42%9 mph
  40. 3 PM83°37%10 mph
  41. 4 PM86°35%11 mph
  42. 5 PM84°30%12 mph
  43. 6 PM83°39%11 mph
  44. 7 PM81°33%6 mph
  45. 8 PM80°85%3 mph
  46. 9 PM76°74%4 mph
  47. 10 PM73°74%5 mph
  48. 11 PM72°74%1 mph

In depth

The weather picture for Williamsport opens with partly cloudy; it's 18 °C out, feeling like 18 °C. Today's forecast calls for fog, topping out near 28 °C before falling back to 13 °C overnight. Winds blow mainly from the WNW around 13 km/h, with gusts up to 20 km/h. Daytime highs hold fairly steady this week, staying within 26 to 30 °C. Rain is in the picture on tomorrow, Friday, with roughly 12 mm expected in total across the week. Tomorrow brings moderate rain with a high of 30 °C and a 85% chance of precipitation. The UV index reaches 7 today, so sun protection is sensible during the middle of the day. Sunrise comes at 05:35 and sunset at 20:44, giving 15.2 hours of daylight. Current humidity sits at 84% with pressure near 1013 hPa. Looking further out, Thursday shows moderate drizzle with a high around 30 °C, while Saturday ends the week at 28 °C. Forecast details are refreshed throughout the day as new model runs arrive, so check back for the latest figures.

Air quality

28

Good

US AQI · European AQI 31

Air quality in Williamsport is currently good, with a US AQI of 28 (European AQI 31). The dominant pollutant right now is ozone. Air quality is healthy; no precautions needed. Fine particulate matter (PM2.5) measures 4.3 µg/m³.

Pollutants

PM2.5
4.3 µg/m³
PM10
4.5 µg/m³
Ozone (O₃)
77 µg/m³
NO₂
2 µg/m³
SO₂
0.7 µg/m³
CO
134 µg/m³
Dust
0 µg/m³

Sun & UV

Sunrise
5:35 AM
Sunset
8:44 PM
Daylight
15h 09m
Max UV
7.15 High

Wind

Wind
4 mph
Gusts
11 mph
Direction
WSW (252°)

Farming weather

Soil temperatures today read surface 15.1 °C, 6 cm 18.3 °C, 18 cm 19.9 °C, 54 cm 17.4 °C. Soil moisture sits at 0-1 cm at 0.13 m³/m³, 3-9 cm at 0.14 m³/m³, 27-81 cm at 0.2 m³/m³. For maize, the root-zone reading is below the ideal 0.2-0.35 m³/m³ band. Reference evapotranspiration totals 32 mm against only 12 mm of expected rain — a 20 mm deficit, so irrigation will be needed this week. A suitable spraying window opens around 06:00 on 2026-06-21, with winds at or below 15 km/h and no rain expected. Projected growing degree days over the next week: maize 79, wheat 118.

Topsoil moisture
0.137 m³/m³
Soil temp
56°F
ET₀ today
5.69 mm
Spray window
~5:00
Rain (next 7d)
0.5 in
Wind
4 mph
Humidity
88%

Full farming outlook for Williamsport →

Advisory summary

No weather alert thresholds are crossed for Williamsport in the current forecast (derived from forecast data, not official warnings). Conditions may still change — check back for updates.

All data for Williamsport
Every forecast variable for Williamsport with human-readable labels
VariableValue
CityWilliamsport, Pennsylvania, United States
Coordinates41.24119, -77.00108
Elevation158 m
TimezoneAmerica/New_York
Population29,201
Observed at (local)8:15 AM
Temperature (2 m)64°F
Apparent temperature61°F
Relative humidity (2 m)88%
Dew point (2 m)56°F
Precipitation (last hour)0 in
Rain0 in
Showers0 in
Snowfall0 in
Weather code (WMO)2
Cloud cover51%
Surface pressure29.4 inHg
Sea-level pressure29.9 inHg
Wind speed (10 m)4 mph
Wind gusts (10 m)11 mph
Wind direction (10 m)252° (WSW)
Visibility9.1 mi
UV index0
Day / nightDay
Today max / min82°F / 56°F
Today feels-like max / min81°F / 55°F
Today precipitation sum0 in
Today rain sum0 in
Today snowfall sum0 in
Today max precip probability9%
Today max wind / gusts8 mph / 12 mph
Dominant wind direction292° (WNW)
Sunrise / sunset5:35 AM / 8:44 PM
Daylight duration15h 09m
Sunshine duration12h 20m
Max UV index7.15
Reference evapotranspiration (ET₀)5.69 mm
Topsoil moisture (0–1 cm)0.137 m³/m³
Surface soil temperature56°F
US AQI28
European AQI31
PM2.54.3 µg/m³
PM104.5 µg/m³
Ozone (O₃)77 µg/m³
Nitrogen dioxide (NO₂)2 µg/m³
Sulphur dioxide (SO₂)0.7 µg/m³
Carbon monoxide (CO)134 µg/m³
Dust0 µg/m³

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Frequently asked questions

Will it rain in Williamsport tomorrow?

Rain is likely in Williamsport tomorrow — the chance of precipitation reaches 85%, with around 4.7 mm expected.

What is the temperature in Williamsport today?

Today Williamsport sees fog with a high of 28 °C and a low of 13 °C.

How hot will it be in Williamsport tomorrow?

Tomorrow's high in Williamsport is forecast at 30 °C with moderate rain.

Is it windy in Williamsport today?

No, not especially; gusts only reach up to 20 km/h today.

What is the UV index in Williamsport today?

The UV index peaks at 7 today, which is high.

What time is sunrise and sunset in Williamsport today?

The sun rises at 05:35 and sets at 20:44 local time.

Is the air quality in Williamsport good today?

Air quality is good right now, with a US AQI reading of 28.