Llandaff, United Kingdom — Weather in July 2026

Monthly climate averages for Llandaff, United Kingdom. Based on 10-year ERA5 reanalysis data.

Cfb Oceanic
7.7 /10
Excellent

July is an excellent month in Llandaff

Climate Overview

Llandaff, United Kingdom in July has mild conditions, with highs averaging 20°C (68°F) and noticeably cooler mornings. Rain falls on about 12 days this month. Sea temperature stays cool at 19.3°C (67°F).

This month falls at the middle of Summer.

Temperatures remain fairly steady throughout July, with daily highs around 19°C (66°F).

Rainfall is heaviest during the last third of the month, while the first third tends to be drier.

Expect around 11.5h of sunshine at the start of July, decreasing to 10.3h by the end.

The warmest days tend to fall around the 18th, averaging 21.7°C (71°F).

Compared to June, this month is about 2°C warmer with 1 more rainy days.

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Monthly July Averages

Temperature
20°C / 14°C
Feels Like
19°C / 13°C
Rain
12 days · 72 mm
Sunshine
10.9h / day
Humidity
77% — Humid
Wind
20 km/h
Wind Direction
W (265°)
Gusts
38 km/h
Daylight
16.1 h
Cloud Cover
64%
Clear Sky Days
1.7
UV Index
5.9 — High
Sea Temperature
19°C
Dew Point
13°C — Comfortable
Moon Phase
New Moon · 0%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

28°C 25°C 22°C 19°C 16°C 13°C 10°C 151015202531
High Low

Daily Precipitation

0 mm 2 mm 4 mm 6 mm 8 mm 151015202531
Rainfall

Daily Sunshine

0h 4h 8h 12h 16h 151015202531
Sunshine

Daily Wind Speed

0 6 12 18 24 30 151015202531
Wind Speed
Sun Position
Sunrise 05:13
Daylight 16.2h
Sunset 21:24

What to Expect

Daytime temperatures around 20°C (68°F) are ideal for full-day outdoor exploration. Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Wet weather can spread across much of the day, so it is best to keep outdoor plans flexible.

2 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

January
Poor
Temp
8°C / 3°C
Feels Like
4°C / -1°C
Rain
13days (92 mm) Wet
Sun
3.9h Poor
Humidity
87% Very Muggy
UV
1.1 Low
Snow Days
1days
View Details
February
Poor
Temp
9°C / 4°C
Feels Like
4°C / -1°C
Rain
12days (90 mm) Wet
Sun
5.1h Fair
Humidity
84% Humid
UV
1.5 Low
Snow Days
1days
View Details
March
Poor
Temp
10°C / 4°C
Feels Like
6°C / 0°C
Rain
15days (92 mm) Wet
Sun
6.8h Fair
Humidity
82% Humid
UV
3.3 Moderate
Snow Days
1days
View Details
April
Fair
Temp
13°C / 6°C
Feels Like
9°C / 2°C
Rain
11days (60 mm) Wet
Sun
9.3h Good
Humidity
77% Humid
UV
4.5 Moderate
View Details
May best
Good
Temp
16°C / 9°C
Feels Like
14°C / 6°C
Rain
11days (67 mm) Wet
Sun
10.8h Excellent
Humidity
77% Humid
UV
5.6 High
View Details
June best
Good
Temp
19°C / 12°C
Feels Like
17°C / 10°C
Rain
11days (69 mm) Wet
Sun
10.7h Excellent
Humidity
78% Humid
UV
6.2 High
View Details
July best
Excellent
Temp
20°C / 14°C
Feels Like
19°C / 13°C
Rain
12days (72 mm) Wet
Sun
10.9h Excellent
Humidity
77% Humid
UV
5.9 High
View Details
August best
Excellent
Temp
20°C / 14°C
Feels Like
19°C / 13°C
Rain
11days (77 mm) Wet
Sun
9.7h Good
Humidity
79% Humid
UV
5.2 High
View Details
September best
Good
Temp
18°C / 12°C
Feels Like
16°C / 10°C
Rain
13days (106 mm) Wet
Sun
7.6h Good
Humidity
82% Humid
UV
3.8 Moderate
View Details
October
Poor
Temp
14°C / 10°C
Feels Like
12°C / 7°C
Rain
15days (121 mm) Wet
Sun
5.8h Fair
Humidity
84% Humid
UV
2.4 Moderate
View Details
November
Poor
Temp
11°C / 6°C
Feels Like
7°C / 3°C
Rain
15days (113 mm) Wet
Sun
4.3h Fair
Humidity
86% Very Muggy
UV
1.3 Low
View Details
December
Poor
Temp
9°C / 5°C
Feels Like
5°C / 1°C
Rain
15days (121 mm) Wet
Sun
3.1h Poor
Humidity
88% Very Muggy
UV
0.8 Low
View Details
Month Temp Feels Like Rain Sun Humidity UV Status
January 8°C / 3°C 4°C / -1°C 13days (92 mm) Wet 3.9h Poor 87% Very Muggy 1.1 Low Poor View Details
February 9°C / 4°C 4°C / -1°C 12days (90 mm) Wet 5.1h Fair 84% Humid 1.5 Low Poor View Details
March 10°C / 4°C 6°C / 0°C 15days (92 mm) Wet 6.8h Fair 82% Humid 3.3 Moderate Poor View Details
April 13°C / 6°C 9°C / 2°C 11days (60 mm) Wet 9.3h Good 77% Humid 4.5 Moderate Fair View Details
May best 16°C / 9°C 14°C / 6°C 11days (67 mm) Wet 10.8h Excellent 77% Humid 5.6 High Good View Details
June best 19°C / 12°C 17°C / 10°C 11days (69 mm) Wet 10.7h Excellent 78% Humid 6.2 High Good View Details
July best 20°C / 14°C 19°C / 13°C 12days (72 mm) Wet 10.9h Excellent 77% Humid 5.9 High Excellent View Details
August best 20°C / 14°C 19°C / 13°C 11days (77 mm) Wet 9.7h Good 79% Humid 5.2 High Excellent View Details
September best 18°C / 12°C 16°C / 10°C 13days (106 mm) Wet 7.6h Good 82% Humid 3.8 Moderate Good View Details
October 14°C / 10°C 12°C / 7°C 15days (121 mm) Wet 5.8h Fair 84% Humid 2.4 Moderate Poor View Details
November 11°C / 6°C 7°C / 3°C 15days (113 mm) Wet 4.3h Fair 86% Very Muggy 1.3 Low Poor View Details
December 9°C / 5°C 5°C / 1°C 15days (121 mm) Wet 3.1h Poor 88% Very Muggy 0.8 Low Poor View Details

What to Wear

Dress in layers — a mix of long sleeves, light sweaters, and a versatile jacket works best for changeable conditions.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

UmbrellaWaterproof jacketComfortable walking shoes

Frequently Asked Questions

July is typically excellent for visiting Llandaff, with average highs of 20°C (68°F) and around 12 rainy days. Llandaff, United Kingdom in July has mild conditions, with highs averaging 20°C (68°F) and noticeably cooler mornings. R
Llandaff typically sees around 12 rainy days in July with 72 mm (2.8 in) of total rainfall. Pack a waterproof jacket.
Evenings in Llandaff during July are mild at 14°C (57°F). A light cardigan is usually enough.
With highs of 20°C (68°F) and lows of 14°C (57°F) in July, we recommend: Umbrella, Waterproof jacket, Comfortable walking shoes. Comfortable walking shoes are essential.
Yes, July offers some of the best weather conditions in Llandaff with comfortable temperatures and lower chances of rain.
The average UV index in Llandaff during July is 6 (high). Wear sunscreen SPF 30+, a hat, and sunglasses. Limit direct sun exposure between 10 AM and 4 PM.
Llandaff gets approximately 16 hours of daylight per day in July, with around 11 hours of sunshine.
Snow is uncommon in Llandaff during July based on 10-year climate averages.

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