Before you go

Cornwall weather averages, month by month

Photograph to come Cornish weather.

Long-term averages for 1991–2020 at the Met Office weather station at Camborne, in west Cornwall. We calculated them from the Met Office’s published monthly station data. They are averages, not a forecast.

The year in numbers

Warmest month (avg high): August, 19.0°C
Coldest month (avg low): February, 4.6°C
Wettest month: November, 130 mm
Driest month: May, 61 mm
Sunniest month: May, 208 hours
Total in an average year: 1076 mm rain, 1612 hours of sun

Every month

Month	Avg daily high	Avg nightly low	Avg rainfall	Avg sunshine	Avg air frost days
January	9.2°C	4.9°C	121 mm	60 h	2.2
February	9.1°C	4.6°C	95 mm	82 h	2.1
March	10.2°C	5.4°C	72 mm	121 h	1.1
April	12.1°C	6.6°C	73 mm	181 h	0.0
May	14.5°C	8.8°C	61 mm	208 h	0.0
June	16.9°C	11.2°C	63 mm	205 h	0.0
July	18.7°C	13.2°C	69 mm	190 h	0.0
August	19.0°C	13.4°C	79 mm	180 h	0.0
September	17.5°C	12.0°C	78 mm	154 h	0.0
October	14.6°C	10.0°C	111 mm	108 h	0.0
November	11.8°C	7.4°C	130 mm	68 h	0.2
December	9.9°C	5.6°C	126 mm	54 h	1.7

How we worked these out

We took each month’s figures for 1991 to 2020 from the Met Office’s historic data for Camborne and averaged them. Each monthly figure averages at least 30 years of data; the Met Office marks some values as estimated, and we include them. Our figures may differ slightly from the Met Office’s official climate averages, which use their own methods.

Camborne is one station, about 87 metres above sea level according to the Met Office file, on the west Cornwall mainland. Weather varies across Cornwall, so other places will differ. Use the Met Office forecast for the day you travel.

For daylight, holidays and beach rules each month, see Cornwall month by month.

Sources and checks

Met Office: Camborne historic station data – 1991–2020, our calculation, Open Government Licence v3.0

Last checked: 1 November 2026. Published by Oaknest Media. How we check: editorial policy.