Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™

St Mellons, Cardiff

63°F
Location Chevron down
Location News Videos
Use Current Location
Recent

St Mellons

Cardiff

63°
No results found.
Try searching for a city, zip code or point of interest.
Get Premium+
Create Your Account Unlock extended daily and hourly forecasts — all with your free account.
Let's Go Chevron right
Have an account already? Log In
settings
Help
St Mellons, Cardiff Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

News & Features

Astronomy

Business

Climate

Health

Recreation

Sports

Travel

For Business

Warnings

Data Suite

Forensics

Advertising

Superior Accuracy™

Video

Today Hourly 10-Day Radar MinuteCast®

Monthly

Air Quality Health & Activities

July

January February March April May June July August September October November December

2026

2025 2026 2027

10-Day

S
M
T
W
T
F
S
28
66°
59°
29
66°
57°
30
68°
57°
1
68°
57°
2
72°
54°
3
72°
52°
4
68°
59°
5
68°
59°
6
75°
59°
7
70°
59°
8
N/A
9
Mostly sunny and very warm
85°
63°
10
Mostly sunny and very hot
93°
67°
11
Sunny and very hot
92°
62°
12
Clouds and sun; windy, hot
90°
61°
13
Windy and very warm
86°
62°
14
Breezy and very warm
85°
63°
15
Mostly sunny and very warm
85°
64°
16
A shower in the morning
84°
63°
17
Very warm with some sun
81°
60°
18
Mostly cloudy and warm
78°
59°
19
Mostly cloudy and warm
77°
59°
20
A little rain in the morning
75°
58°
21
Sunshine and a few clouds
76°
57°
22
Turning out cloudy
70°
57°
23
Mostly sunny
71°
56°
24
Partly sunny
71°
57°
25
Mostly cloudy
73°
57°
26
Turning cloudy
74°
56°
27
Cloudy
74°
57°
28
Mostly cloudy
72°
56°
29
Mostly sunny
73°
54°
30
Mostly sunny
74°
57°
31
Cloudy
74°
58°
1
Partial sunshine
73°
57°

Temperature Graph

°F
100° 90° 80° 70° 60° Jul
Today 1 2 3 4 5 6 7 *8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable

July Weather in St Mellons

St Mellons's July 2026 forecast shows daily high temperatures ranging from 70° to 93°, with overnight lows between 54° and 67°. The average high for July is 79° with an average low of 59°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in St Mellons. See also: August | September | October.

Further Ahead

August 2026

September 2026

October 2026

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

Video

Top Stories

Weather Forecasts

Next heat dome to bring 100 F heat to Midwest; perhaps East again

12 hours ago

Severe Weather

Tireless severe storms to repeat from Plains to mid-Atlantic

40 minutes ago

Hurricane

Atlantic hurricane season off to a slow start as El Niño strengthens

12 hours ago

Weather Forecasts

Downpours may rapidly elevate flash flood risk centered on Kentucky

43 minutes ago

Live Blog

Live: World Cup 2026 weather updates

LATEST ENTRY

Quarterfinals to commence with heat on Thursday

1 day ago

More Stories

Featured Stories

Super Typhoon Bavi leaves trail of destruction

17 hours ago 0:36

Recreation

Neil the Seal returns to Tasmania

11 hours ago

Weather News

At least 750 structures destroyed by Colorado wildfire, images show

12 hours ago

Weather News

Toll from Venezuela earthquakes rises to 3,342, more than 16K injured

2 days ago

World Europe United Kingdom Cardiff St Mellons

Weather Near St Mellons:

  • Bristol, City of Bristol
  • Cardiff, Cardiff
  • Swansea, Swansea
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News
© 2026 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved.
Terms of Use | Privacy Policy | Cookie Policy | About Your Privacy Do Not Sell or Share My Personal Information | Data Sources

...

...

...