Johnston weather — 10-day forecast

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

Now

Reading from 21:00 · NOAA HRRR model

27 °C

Clear sky

Feels like 30 °C

10.3 km/hforce 2

Next 12 h

  • 2127°
  • 2226°
  • 2325°
  • 0025°
  • 0124°
  • 0224°
  • 0324°
  • 0423°
  • 0523°10 %
  • 05:48Sunrise
  • 0622°12 %
  • 0723°
  • 0825°
  • 0926°

27°21:00 22°06:00

Humidity
79 %
Dew point
23 °C
Gusts
24.3 km/h
Clouds
0 %
Pressure
1,017 hPa ↑
Storm
severe possible

Grid point 1.2 km away · 3.0 km grid · elevation 61 m

Air quality

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

Reading from 20:00
37
Fair

Index set by Ozone

Ozone
93.4µg/m³
PM2.5
6.4µg/m³
PM10
6.4µg/m³
Nitrogen dioxide
5.6µg/m³
Sulphur dioxide
0.7µg/m³
Carbon monoxide
232.0µg/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.

19° → 32°

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

  • Today

    Clear sky74 %

    32°

    25°

  • Sat

    Light rain64 %

    31°

    22°

  • Sun

    Mainly clear64 %

    32°

    21°

  • Mon

    Mainly clear42 %

    32°

    19°

  • Tue

    Thunderstorm58 %

    29°

    23°

  • Wed

    Overcast58 %

    25°

    21°

  • Thu

    Mainly clear

    30°

    20°

  • Fri

    Light drizzle0 mm

    30°

    22°

  • Sat

    Clear sky

    27°

    19°

  • Sun

    Partly cloudy

    27°

    20°

Sun and UV

Sunrise, sunset, day length and ultraviolet intensity.

Max UV8very high
Sunrise
05:47
Daylight
14 h 10
Sunset
19:57

Radiation · 11.1 MJ/m²

Sea state

Sea state at the marine grid point closest to the city.

0.6 mperiod 5 s 203°

Significant height: the mean of the highest third of waves. Individual waves reach about twice it.

Data: ECMWF

Today in Johnston the mean temperature will be 29.0 °C — +6.6 °C against the normal for 7 August, measured from 1940 to 2026. (1,290 obs.)

Johnston climate — normals and trends