Johnstown weather — 10-day forecast

Temperature, rain, wind and feels-like in Johnstown, hour by hour and over 10 days, with the seasonal normal for context.

Now

Reading from 15:00 · NOAA HRRR model

27 °C

Partly cloudy

Feels like 30 °C

6.6 km/hforce 1

Next 12 h

  • 1527°
  • 1628°
  • 1728°45 %
  • 1828°
  • 1922°95 %
  • 2022°94 %
  • 20:24Sunset
  • 2122°
  • 2221°
  • 2321°
  • 0021°
  • 0121°
  • 0220°
  • 0320°

28°17:00 20°03:00

Humidity
71 %
Dew point
21 °C
Gusts
12.5 km/h
Clouds
75 %
Pressure
1,020 hPa ↓
UV
5 · moderate
Storm
likely

Grid point 1.2 km away · 3.0 km grid · elevation 432 m

Air quality

The European air-quality index for the city, and the pollutants that set it.

Reading from 14:00
37
Fair

Index set by Ozone

Ozone
92.8µg/m³
PM2.5
4.4µg/m³
PM10
4.4µg/m³
Nitrogen dioxide
0.7µg/m³
Sulphur dioxide
1.2µg/m³
Carbon monoxide
200.0µg/m³
Dust (AOD)
0.00

Generated using Copernicus Atmosphere Monitoring Service information

Hour by hour

Step-by-step detail: temperature, wind, cloud cover and ultraviolet.

Estimated from a deterministic model, not an ensemble probability.
°C

10 days

Each day's extremes and the chance of rain, out to the end of the run.

16° → 28°

Rain probability (> 1 mm): 50 ECMWF ensemble members.

  • Today

    Thunderstorm100 %

    28°

    21°

  • Sat

    Light drizzle100 %

    28°

    20°

  • Sun

    Light showers82 %

    28°

    20°

  • Mon

    Thunderstorm68 %

    27°

    16°

  • Tue

    Light showers100 %

    27°

    22°

  • Wed

    Showers32 mm

    22°

    20°

  • Thu

    Partly cloudy0 mm

    25°

    18°

  • Fri

    Partly cloudy

    27°

    19°

  • Sat

    Thunderstorm7 mm

    25°

    18°

  • Sun

    Thunderstorm4 mm

    22°

    18°

Gusts · Sun 51.0 km/h

Sun and UV

Sunrise, sunset, day length and ultraviolet intensity.

Max UV6high
Sunrise
06:20
Daylight
14 h 04
Sunset
20:24

Radiation · 15.8 MJ/m²

Today in Johnstown the mean temperature will be 24.1 °C — +3.8 °C against the normal for 7 August, measured from 1940 to 2026. (1,290 obs.)

Johnstown climate — normals and trends