Cornwall, United Kingdom Weather

  1. Cornwall, United Kingdom Weather
  2. Current conditions
  3. Weather forecast
  4. Averages and extremes
  5. Yesterday's Data
  6. Temperature and possibility of rain in Cornwall over the next 12 hours
  7. Temperature and possibility of rain in Cornwall in the coming days
  8. Rainfall in Cornwall in the coming days
  9. Cornwall Weather Summary
  10. Weather averages by month
  11. Cornwall's weather
  12. Frequently asked questions
  13. Comments
Cornwall, Weather
(Photo by Viktor Forgacs on Unsplash)

Current conditions

Updated:
17°C
62.6°F
°C °F

Condition: Overcast

Pressure: 1,015 hPa

Feel like: 16 °C

Temperature: 17°C

Cloud: 99%

Humidity: 82%

Wind: SW - 15 km/h

Visibility: 32.18 km

Weather forecast

Sat
19 Sep
14°C / 18°C
Drizzle
Sun
20 Sep
12°C / 20°C
Overcast
Mon
21 Sep
13°C / 18°C
Drizzle
Tue
22 Sep
11°C / 17°C
Drizzle
Wed
23 Sep
10°C / 17°C
Overcast
Hourly forecast today:
20:00 PM
13° / 17°
13° / 17°
Overcast
82% 30 km/h
21:00 PM
14° / 17°
14° / 17°
Overcast
87% 32 km/h
22:00 PM
15° / 17°
15° / 17°
Overcast
88% 32 km/h
23:00 PM
15° / 17°
15° / 17°
Overcast
90% 28 km/h
00:00 AM
15° / 17°
15° / 17°
Overcast
90% 27 km/h
01:00 AM
14° / 16°
14° / 16°
Partly Cloudy
85% 26 km/h
02:00 AM
13° / 15°
13° / 15°
Clear Sky
87% 23 km/h
03:00 AM
14° / 15°
14° / 15°
Partly Cloudy
89% 21 km/h
04:00 AM
14° / 15°
14° / 15°
Clear Sky
89% 24 km/h
05:00 AM
14° / 16°
14° / 16°
Overcast
89% 23 km/h
06:00 AM
14° / 16°
14° / 16°
Overcast
89% 24 km/h

30 Day Averages and Extremes

  • Average high 17.17°C
  • Average low 12.23°C
  • Hottest day 22°C (05 September 2026)
  • Coldest day 0°C (01 October 2026)
  • Average humidity 76.53%
  • Days with precipitation 24 days
  • Highest precipitation 57 mm (07 September 2026)

Yesterday's Data

  • Max: 17°C
  • Min: 14°C
  • Total Precipitation: 0 mm

Temperature and possibility of rain in Cornwall over the next 12 hours

Temperature and possibility of rain in Cornwall in the coming days

Rainfall in Cornwall in the coming days

Cornwall Climate Summary

Cornwall features a Marine west coast, warm summer (Köppen classification: Cfb), with an average annual temperature of 12.23ºC (54.01ºF), which is about 1.48% higher than the national average for United Kingdom. Annually, the city experiences approximately 60.54 millimeters (2.38 inches) of rainfall, spread across 139.26 rainy days, accounting for 38.15% of the year.

Longitude 50.2660471
Latitude -5.0527125
Yearly high temperature 13.12ºC (55.62ºF)
Yearly low temperature 10.44ºC (50.79ºF)
Hottest month July 17.81ºC (64.06ºF)
Coldest month December 8.21ºC (46.78ºF)
Yearly precip 60.54mm (2.38in)
Days with rainfall 139.26 days (38.15%)
Driest month May (83.2%)
Wettest month December (80.38%)

Weather averages by month

Month High / Low (°C) Rain
January 9.27° / 7.02° 14.73 days
February 8.94° / 6.63° 12.0 days
March 9.75° / 6.91° 11.27 days
April 11.39° / 8.25° 9.18 days
May 13.37° / 10.2° 7.0 days
June 15.82° / 12.67° 10.73 days
July 17.81° / 14.76° 8.27 days
August 17.78° / 15.09° 11.73 days
September 16.62° / 13.86° 9.45 days
October 14.46° / 12.04° 13.45 days
November 11.85° / 9.61° 15.09 days
December 10.38° / 8.21° 16.36 days

Cornwall's weather

Frequently asked questions

1. What is the hottest month in Cornwall?

July has the highest average monthly temperature (daily mean of 17.81ºC) and December are the coolest (daily mean of 8.21ºC).

2. What should I wear in Cornwall today?

For today's mild weather in Cornwall, with temperatures between 15ºC to 18ºC (59.0ºF to 64.4ºF), consider wearing:
- Long-sleeve shirt or blouse
- Casual sneakers or loafers
- Light jacket (for cooler periods)
- Lightweight sweater or cardigan

Temperature

Early
11°C / 14°C
Morning
10°C / 16°C
Afternoon
10°C / 17°C
Evening
14°C / 17°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 432
  • CO 178
  • NH3 0
  • NO2 1
  • O3 69
  • PM10 16
  • PM25 5
  • SO2 0
  • CH4 1,380

Sunrise / Sunset

06:01
18:25