🇬🇧 Weather in Harrow
Map Overlays:
Hourly Forecast for Harrow
21:00
20°
3%
22:00
18°
3%
23:00
17°
3%
00:00
16°
4%
01:00
15°
5%
02:00
15°
6%
03:00
14°
7%
04:00
14°
8%
05:00
13°
9%
06:00
13°
9%
07:00
14°
7%
08:00
16°
6%
09:00
18°
4%
10:00
20°
2%
11:00
22°
2%
12:00
23°
1%
13:00
25°
1%
14:00
26°
2%
15:00
27°
3%
16:00
28°
3%
17:00
28°
3%
18:00
27°
6%
19:00
26°
8%
20:00
25°
4%
14-Day Forecast for Harrow
2026-07-26
Partly Cloudy
26° /
16°
2026-07-27
Sunny
28° /
13°
2026-07-28
Sunny
32° /
18°
2026-07-29
Sunny
36° /
21°
2026-07-30
Sunny
28° /
19°
2026-07-31
Sunny
26° /
14°
2026-08-01
Sunny
25° /
14°
Additional Forecasts for Harrow
Air Quality
💨 US EPA Index 1 (Good)
CO (Carbon Monoxide) 135.0 μg/m³
O₃ (Ozone) 63.0 μg/m³
NO₂ (Nitrogen Dioxide) 3.7 μg/m³
SO₂ (Sulphur Dioxide) 0.2 μg/m³
PM2.5 (Fine particles) 3.5 μg/m³
PM10 (Coarse particles) 5.3 μg/m³
Historical Weather
Weather Forecasts for Other Cities in United Kingdom
Weather in Harrow — FAQ
Answers refreshed each request based on current conditions in Harrow.
What is the weather like right now in Harrow?
Right now in Harrow, United Kingdom the temperature is 21.6°C (feels like 13.4°C), with partly cloudy. Relative humidity is 42% and wind is 21.6 km/h.
What is today's high and low temperature in Harrow?
Today's forecast high in Harrow is 26.0°C and the overnight low is 15.9°C. The diurnal range — high minus low — depends on cloud cover; clear days swing more than overcast ones.
Will it rain in Harrow today?
The chance of precipitation in Harrow today is 36%. Forecast accuracy is highest within the next 6 hours and decreases steadily out to 14 days.
How often does the weather here update?
Current observations refresh every 15-60 minutes from the nearest monitoring stations operated by national meteorological agencies. The hourly forecast updates approximately every hour; the 7- and 14-day outlook is recomputed several times per day.
What does 'feels like' temperature mean?
Feels-like (apparent) temperature accounts for humidity, wind chill and direct sunshine — variables that change how the human body perceives heat or cold. On hot, humid days it can be 3-7°C above the actual reading; on cold windy days it can be 5-15°C below.
Why does the temperature in Harrow differ from nearby cities?
Even short distances can change temperatures noticeably. Harrow's reading reflects altitude, proximity to large bodies of water, urban heat island effects, and the exact location of the monitoring stations supplying the data. Coastal cities are typically milder and more humid than inland equivalents.