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Weather in Cornwall for July 2026

Your guide to Cornwall weather in July - trends and predictions

    Temperatures

  • So far, July 2026 in Cornwall shows a warmer trend than usual by 3.1 °C.

  • The forecast for the next days in Cornwall predicts temperatures to be around 19 °C, close to the historical average.

  • In general, the average temperature in Cornwall at the beginning of July is 16.7 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 18.9 °C by the end of July.

    • Rain 🌧️

  • The climate of Cornwall in July is notably wet, with an average of 12 rainy days, and a total of 43.3 mm of precipitation.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
19
Dry days
Average rainy days
12
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/14°
Temperatures
Average wind speed
23 km/h
Avg max wind
Average humidity
80 %
Avg humidity

Cornwall Weather July

Move between months or click on a day
June
August
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Patchy rain possible
16°
2
Patchy rain possible
16°
3
Patchy rain possible
17°
4
Patchy rain possible
17°
5
Light rain shower
17°
6
Light rain shower
17°
7
Patchy light drizzle
17°
8
Heavy rain
18°
9
Patchy rain possible
20°
10
Sunny
22°
11
Sunny
22°
12
Light rain shower
22°
13
Patchy rain possible
21°
14
Patchy rain possible
19°
15
Light rain shower
20°
16
Patchy rain possible
20°
17
Patchy rain possible
20°
18
Overcast
19°
19
Patchy rain possible
20°
20
Sunny
20°
21
Sunny
21°
22
Sunny
19°
23
Sunny
20°
24
Sunny
21°
25
Sunny
21°
26
Sunny
18°
27
Patchy rain possible
17°
28
Sunny
17°
29
Sunny
19°
30
Sunny
20°
31
Sunny
20°

Temperatures trend during July in Cornwall

See the weather trend as well as the moving average line

July weather in Cornwall day by day

Click on a date for more information
June August
Date Weather Temperatures Rain UV More
1 Jul. Patchy rain possible
Patchy rain possible
 16° /14° 0.5 mm 4
2 Jul. Patchy rain possible
Patchy rain possible
 16° /12° 0.9 mm 5
3 Jul. Patchy rain possible
Patchy rain possible
 17° /12° 0.3 mm 6
4 Jul. Patchy rain possible
Patchy rain possible
 17° /14° 0.3 mm 5
5 Jul. Light rain shower
Light rain shower
 17° /14° 4.4 mm 6
6 Jul. Light rain shower
Light rain shower
 17° /13° 2.4 mm 6
7 Jul. Patchy light drizzle
Patchy light drizzle
 17° /13° 1.6 mm 6
8 Jul. Heavy rain
Heavy rain
 18° /13° 8.2 mm 6
9 Jul. Patchy rain possible
Patchy rain possible
 20° /14° 0.2 mm 6
10 Jul. Sunny
Sunny
 22° /15° 0 mm 7
11 Jul. Sunny
Sunny
 22° /16° 0.1 mm 6
12 Jul. Light rain shower
Light rain shower
 22° /16° 1.9 mm 6
13 Jul. Patchy rain possible
Patchy rain possible
 21° /15° 0.3 mm 6
14 Jul. Patchy rain possible
Patchy rain possible
 19° /13° 0.9 mm 6
15 Jul. Light rain shower
Light rain shower
 20° /15° 1.5 mm 6
16 Jul. Patchy rain possible
Patchy rain possible
 20° /15° 1.1 mm 6
17 Jul. Patchy rain possible
Patchy rain possible
 20° /15° 0.2 mm 6
18 Jul. Overcast
Overcast
 19° /14° 0.1 mm 6
19 Jul. Patchy rain possible
Patchy rain possible
 20° /14° 2.3 mm 6
20 Jul. Sunny
Sunny
 20° /16° 0 mm 7.1
21 Jul. Sunny
Sunny
 21° /15° 0 mm 7.2
22 Jul. Sunny
Sunny
 19° /16° 0 mm 6.9
23 Jul. Sunny
Sunny
 20° /16° 0 mm 7
24 Jul. Sunny
Sunny
 21° /15° 0 mm 6.1
25 Jul. Sunny
Sunny
 21° /16° 0.7 mm 6
26 Jul. Sunny
Sunny
 18° /14° 7.2 mm 5
27 Jul. Patchy rain possible
Patchy rain possible
 17° /15° 2.9 mm 4
28 Jul. Sunny
Sunny
 17° /15° 0.1 mm 5
29 Jul. Sunny
Sunny
 19° /16° 0 mm 5
30 Jul. Sunny
Sunny
 20° /17° 0 mm 6
31 Jul. Sunny
Sunny
 20° /17° 0.8 mm 5
Next
Important Notice
Our weather forecast for Cornwall in July is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Cornwall forecast closer to your planned date for the most up-to-date weather information.
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Cornwall in July - FAQ

What are the expected maximum and minimum temperatures in Cornwall during July?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Cornwall during July?
In July, Cornwall can expect light to moderate rainfall, totaling 43.3 mm across approximately 12 days. Occasional showers are possible, and planning ahead for them could be helpful.

What are the typical wind conditions in Cornwall during July?
The average wind speed in Cornwall during July is 23 km/h, suggesting breezy to windy conditions, depending on your activities.

Cornwall water temperatures in July

The average water temperature of the Atlantic Ocean near Cornwall in July is 15.5 °C. At the beginning of July temperatures are around 15.5 °C; by the end of the month they stay fairly steady and reach 15.6 °C.

What is the water temperature in Cornwall in July?
The average water temperature in Cornwall in July is 15.5 °C.
Can you swim in Cornwall in July?
Brisk: quick dips and active swimming are fine, but pack a 2–3 mm spring suit if you plan longer sessions or early-morning outings.

July rainfall patterns in Cornwall

Explore the daily rainfall trends and prepare for Cornwalls July weather 💧
Typically, Cornwall has 12 rainy days in July with a total of 43.3 mm of rainfall.

UV exposure in Cornwall during July

Stay informed about UV levels for safe outdoor activities throughout the month of July ☀️
Top locations in Cornwall
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FalmouthLooeNewquayPenzancePerranporthSt AustellSt IvesTruro
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Location coordinates Where is Cornwall?

Get accurate weather forecasts for Cornwall, located at latitude 50.416 and longitude -5.073. Stay updated with localized weather information tailored for Cornwall.

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