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Now · 2:35 PM

Gellilydan Weather & Hourly Forecast

United Kingdom · Wales · LL41 4DT

Light rain
17°C
Light rain
Feels like: 17°C
💧 Humidity 79% 🌡 Pressure 1014 hPa 💨 Wind 29 km/h 👁 Visibility 10.0 km Clouds 100% ☀️ UV index 3.3 · Moderate 🌅 Sunrise 6:30 AM 🌇 Sunset 7:59 PM

Hourly Forecast for Gellilydan

Today
Light rain · 3:00 PM Light rain
17° 💧 0.2 mm 💨 29 km/h H 79%1014 hPa
Overcast · 6:00 PM Overcast
17° 💧 None 💨 29 km/h H 79%1015 hPa
Clear night · 9:00 PM Clear night
16° 💧 None 💨 27 km/h H 87%1017 hPa
Tomorrow
Mostly clear night · 12:00 AM Mostly clear night
15° 💧 None 💨 21 km/h H 91%1019 hPa
Overcast night · 3:00 AM Overcast night
13° 💧 None 💨 16 km/h H 89%1020 hPa
Overcast night · 6:00 AM Overcast night
13° 💧 None 💨 12 km/h H 87%1022 hPa
Overcast · 9:00 AM Overcast
15° 💧 None 💨 9 km/h H 80%1023 hPa
Overcast · 12:00 PM Overcast
17° 💧 None 💨 11 km/h H 75%1024 hPa
Overcast · 3:00 PM Overcast
18° 💧 None 💨 15 km/h H 73%1024 hPa
Overcast · 6:00 PM Overcast
17° 💧 None 💨 13 km/h H 77%1024 hPa
Overcast night · 9:00 PM Overcast night
14° 💧 None 💨 8 km/h H 89%1025 hPa
Sunday
Overcast night · 12:00 AM Overcast night
15° 💧 None 💨 7 km/h H 94%1024 hPa
Overcast night · 3:00 AM Overcast night
14° 💧 2.3 mm 💨 10 km/h H 89%1023 hPa
Light rain · 6:00 AM Light rain
14° 💧 0.2 mm 💨 7 km/h H 99%1020 hPa
Overcast · 9:00 AM Overcast
15° 💧 None 💨 10 km/h H 92%1019 hPa
Overcast · 12:00 PM Overcast
19° 💧 None 💨 19 km/h H 61%1018 hPa

In Gellilydan and, more broadly, across Gwynedd: The afternoon will see a mix of sun and clouds, with temperatures remaining mild between 15 and 18 degrees Celsius. There is a slight chance of light rain, with total accumulation around 0.4 mm, and the probability of rain reaching up to 20%. Winds will be moderate, coming from the west at speeds up to 16 mph, with gusts potentially reaching 27 mph. As evening approaches, conditions are likely to remain similar, with a gentle breeze and a continued variation in cloud cover. Temperatures are expected to stay steady, making for a relatively mild night. Overall, the weather will be quite typical for this time of year, with brief spells of sunshine punctuated by the possibility of a light shower.

15-Day Weather Outlook for Gellilydan

TomorrowTomorrow Overcast Overcast 18°/13° 💧 None 💨 21 km/h
Sunday, Sep 6Sun Sep 6 Moderate rain Moderate rain 20°/13° 💧 2.9 mm 💨 23 km/h
Monday, Sep 7Mon Sep 7 Light rain Light rain 16°/10° 💧 4.1 mm 💨 32 km/h
Tuesday, Sep 8Tue Sep 8 Light rain Light rain 13°/10° 💧 4.1 mm 💨 34 km/h
Wednesday, Sep 9Wed Sep 9 Light rain Light rain 13°/ 💧 4.5 mm 💨 22 km/h
Thursday, Sep 10Thu Sep 10 Light rain Light rain 17°/12° 💧 7.2 mm 💨 26 km/h
Friday, Sep 11Fri Sep 11 Light rain Light rain 13°/ 💧 0.7 mm 💨 29 km/h
Saturday, Sep 12Sat Sep 12 Overcast Overcast 14°/ 💧 None 💨 7 km/h
Sunday, Sep 13Sun Sep 13 Sunny Sunny 17°/ 💧 None 💨 8 km/h
Monday, Sep 14Mon Sep 14 Partly cloudy Partly cloudy 18°/ 💧 None 💨 8 km/h
Tuesday, Sep 15Tue Sep 15 Overcast Overcast 18°/ 💧 None 💨 30 km/h
Wednesday, Sep 16Wed Sep 16 Light rain Light rain 13°/ 💧 0.8 mm 💨 23 km/h
Thursday, Sep 17Thu Sep 17 Light rain Light rain 14°/ 💧 1.0 mm 💨 14 km/h
Friday, Sep 18Fri Sep 18 Sunny Sunny 15°/ 💧 None 💨 13 km/h
Saturday, Sep 19Sat Sep 19 Sunny Sunny 16°/ 💧 None 💨 9 km/h

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Gellilydan

Vertical axis: °C · Color based on temperature
Light rain at 3:00 PM
17° Today 3:00 PM
Overcast at 4:00 PM
17° 4:00 PM
Overcast at 5:00 PM
17° 5:00 PM
Overcast at 6:00 PM
17° 6:00 PM
Mostly cloudy at 7:00 PM
17° Today 7:00 PM
Clear night at 8:00 PM
16° 8:00 PM
Clear night at 9:00 PM
16° 9:00 PM
Clear night at 10:00 PM
15° 10:00 PM
Clear night at 11:00 PM
14° Today 11:00 PM
Mostly clear night at 12:00 AM
15° 12:00 AM
Mostly clear night at 1:00 AM
14° 1:00 AM
Overcast night at 2:00 AM
13° 2:00 AM
Overcast night at 3:00 AM
13° Tomorrow 3:00 AM
Overcast night at 4:00 AM
14° 4:00 AM
Overcast night at 5:00 AM
13° 5:00 AM
Overcast night at 6:00 AM
13° 6:00 AM
Overcast at 7:00 AM
13° Tomorrow 7:00 AM
Overcast at 8:00 AM
14° 8:00 AM
Overcast at 9:00 AM
15° 9:00 AM
Overcast at 10:00 AM
15° 10:00 AM
Overcast at 11:00 AM
16° Tomorrow 11:00 AM
Overcast at 12:00 PM
17° 12:00 PM
Overcast at 1:00 PM
17° 1:00 PM
Overcast at 2:00 PM
17° 2:00 PM
Overcast at 3:00 PM
18° Tomorrow 3:00 PM
Overcast at 4:00 PM
18° 4:00 PM
Overcast at 5:00 PM
17° 5:00 PM
Overcast at 6:00 PM
17° 6:00 PM
Mostly cloudy at 7:00 PM
16° Tomorrow 7:00 PM
Mostly cloudy night at 8:00 PM
14° 8:00 PM
Overcast night at 9:00 PM
14° 9:00 PM
Mostly cloudy night at 10:00 PM
14° 10:00 PM
Mostly cloudy night at 11:00 PM
13° Tomorrow 11:00 PM
Overcast night at 12:00 AM
15° 12:00 AM
Overcast night at 1:00 AM
15° 1:00 AM
Overcast night at 2:00 AM
15° 2:00 AM
Overcast night at 3:00 AM
14° Sunday 3:00 AM
Moderate rain at 4:00 AM
14° 4:00 AM
Moderate rain at 5:00 AM
14° 5:00 AM
Light rain at 6:00 AM
14° 6:00 AM
Overcast at 7:00 AM
15° Sunday 7:00 AM
Overcast at 8:00 AM
13° 8:00 AM
Overcast at 9:00 AM
15° 9:00 AM
Overcast at 10:00 AM
16° 10:00 AM
Overcast at 11:00 AM
18° Sunday 11:00 AM
Overcast at 12:00 PM
19° 12:00 PM
Overcast at 1:00 PM
19° 1:00 PM
Overcast at 2:00 PM
20° 2:00 PM
Overcast at 3:00 PM
19° Sunday 3:00 PM
Overcast at 4:00 PM
19° 4:00 PM
Overcast at 5:00 PM
19° 5:00 PM
Overcast at 6:00 PM
18° 6:00 PM
Overcast at 7:00 PM
17° Sunday 7:00 PM
Overcast night at 8:00 PM
16° 8:00 PM
Overcast night at 9:00 PM
16° 9:00 PM
Light rain at 10:00 PM
16° 10:00 PM
Light rain at 11:00 PM
16° Sunday 11:00 PM
Light rain at 12:00 AM
16° 12:00 AM
Light rain at 1:00 AM
15° 1:00 AM
Light rain at 2:00 AM
15° 2:00 AM
Light rain at 3:00 AM
15° Monday 3:00 AM
Light rain at 4:00 AM
15° 4:00 AM
Overcast night at 5:00 AM
14° 5:00 AM
Overcast night at 6:00 AM
13° 6:00 AM
Overcast at 7:00 AM
12° Monday 7:00 AM
Overcast at 8:00 AM
12° 8:00 AM
Overcast at 9:00 AM
13° 9:00 AM
Overcast at 10:00 AM
14° 10:00 AM
Overcast at 11:00 AM
14° Monday 11:00 AM
Light rain at 12:00 PM
14° 12:00 PM
Overcast at 1:00 PM
14° 1:00 PM
Overcast at 2:00 PM
15° 2:00 PM
Light rain at 3:00 PM
15° Monday 3:00 PM
Overcast at 4:00 PM
15° 4:00 PM
Light rain at 5:00 PM
15° 5:00 PM
Light rain at 6:00 PM
14° 6:00 PM
Light rain at 7:00 PM
13° Monday 7:00 PM
Light rain at 8:00 PM
13° 8:00 PM
Moderate rain at 9:00 PM
10° 9:00 PM
Light rain at 10:00 PM
10° 10:00 PM
Overcast night at 11:00 PM
10° Monday 11:00 PM
Overcast night at 12:00 AM
10° 12:00 AM
Overcast night at 1:00 AM
10° 1:00 AM
Overcast night at 2:00 AM
10° 2:00 AM
Overcast night at 3:00 AM
10° Tuesday 3:00 AM
Light rain at 4:00 AM
10° 4:00 AM
Overcast night at 5:00 AM
10° 5:00 AM
Light rain at 6:00 AM
10° 6:00 AM
Light rain at 7:00 AM
10° Tuesday 7:00 AM
Mostly cloudy at 8:00 AM
10° 8:00 AM
Light rain at 9:00 AM
11° 9:00 AM
Light rain at 10:00 AM
11° 10:00 AM
Light rain at 11:00 AM
12° Tuesday 11:00 AM
Light rain at 12:00 PM
12° 12:00 PM
Light rain at 1:00 PM
12° 1:00 PM
Light rain at 2:00 PM
13° 2:00 PM

AIR QUALITY FORECAST

Air Quality Forecast for Gellilydan

Hourly forecast · Updated every 2 hours
Fair
Nearest forecast value 3:00 PM
PM2.5 Fine particles Good 1,7µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 6,5µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Fair 76,7µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 0,9µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in Gellilydan

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.
0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme
Today UV 3,4Moderate 🙂Fair
Tomorrow UV 4,4Moderate 🙂Fair
Sunday UV 3,9Moderate 🙂Fair
Monday UV 3,2Moderate 🙂Fair
Tuesday UV 3,0Moderate 🙂Fair
Wednesday UV 3,0Moderate Unavailable
Thursday UV 4,0Moderate Unavailable
Hourly UV index today
3:00 PMUV 2,5 4:00 PMUV 2,0 5:00 PMUV 1,1 6:00 PMUV 0,5 7:00 PMUV 0,1
Today's weather health advice Open today's recommendations.

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Gellilydan

Vertical axis: km/h · Horizontal axis: hours
Hourly wind speed Chart of sustained wind and maximum gusts in km/h. Today 3:00 PM 4:00 PM 5:00 PM 6:00 PM Today 7:00 PM 8:00 PM 9:00 PM 10:00 PM Today 11:00 PM 12:00 AM 1:00 AM 2:00 AM Tomorrow 3:00 AM 4:00 AM 5:00 AM 6:00 AM Tomorrow 7:00 AM 8:00 AM 9:00 AM 10:00 AM Tomorrow 11:00 AM 12:00 PM 1:00 PM 2:00 PM Tomorrow 3:00 PM 4:00 PM 5:00 PM 6:00 PM Tomorrow 7:00 PM 8:00 PM 9:00 PM 10:00 PM Tomorrow 11:00 PM 12:00 AM 1:00 AM 2:00 AM Sunday 3:00 AM 4:00 AM 5:00 AM 6:00 AM Sunday 7:00 AM 8:00 AM 9:00 AM 10:00 AM Sunday 11:00 AM 12:00 PM 1:00 PM 2:00 PM Sunday 3:00 PM 4:00 PM 5:00 PM 6:00 PM Sunday 7:00 PM 8:00 PM 9:00 PM 10:00 PM Sunday 11:00 PM 12:00 AM 1:00 AM 2:00 AM Monday 3:00 AM 4:00 AM 5:00 AM 6:00 AM Monday 7:00 AM 8:00 AM 9:00 AM 10:00 AM Monday 11:00 AM 12:00 PM 1:00 PM 2:00 PM Monday 3:00 PM 4:00 PM 5:00 PM 6:00 PM Monday 7:00 PM 8:00 PM 9:00 PM 10:00 PM Monday 11:00 PM 12:00 AM 1:00 AM 2:00 AM Tuesday 3:00 AM 4:00 AM 5:00 AM 6:00 AM Tuesday 7:00 AM 8:00 AM 9:00 AM 10:00 AM Tuesday 11:00 AM 12:00 PM 1:00 PM 2:00 PM
Sustained wind Max gusts

Forecast data for Gellilydan were last refreshed today at 2:35 PM. The current forecast period extends through 06/09/2026 at 12:00 PM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.