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
TomorrowTomorrowOvercast18°/13°💧 None💨 21 km/h
Daytime temperature 17°CFeels like 16°CHumidity 75%Pressure 1025 hPaCloud cover 94%Wind direction westGusts 41 km/hSunrise 6:32 AMSunset 7:56 PM
Sunday, Sep 6Sun Sep 6Moderate rain20°/13°💧 2.9 mm💨 23 km/h
Daytime temperature 19°CFeels like 19°CHumidity 61%Pressure 1017 hPaCloud cover 97%Wind direction southwestGusts 47 km/hSunrise 6:34 AMSunset 7:54 PM
Monday, Sep 7Mon Sep 7Light rain16°/10°💧 4.1 mm💨 32 km/h
Daytime temperature 14°CFeels like 14°CHumidity 80%Pressure 1017 hPaCloud cover 100%Wind direction southwestGusts 53 km/hSunrise 6:35 AMSunset 7:52 PM
Tuesday, Sep 8Tue Sep 8Light rain13°/10°💧 4.1 mm💨 34 km/h
Daytime temperature 12°CFeels like 12°CHumidity 82%Pressure 1013 hPaCloud cover 72%Wind direction westGusts 49 km/hSunrise 6:37 AMSunset 7:49 PM
Wednesday, Sep 9Wed Sep 9Light rain13°/8°💧 4.5 mm💨 22 km/h
Daytime temperature 13°CFeels like 13°CHumidity 68%Pressure 1017 hPaCloud cover 94%Wind direction westGusts 38 km/hSunrise 6:39 AMSunset 7:47 PM
Thursday, Sep 10Thu Sep 10Light rain17°/12°💧 7.2 mm💨 26 km/h
Daytime temperature 16°CFeels like 16°CHumidity 100%Pressure 1009 hPaCloud cover 100%Wind direction westGusts 47 km/hSunrise 6:41 AMSunset 7:45 PM
Friday, Sep 11Fri Sep 11Light rain13°/9°💧 0.7 mm💨 29 km/h
Daytime temperature 13°CFeels like 13°CHumidity 72%Pressure 1021 hPaCloud cover 60%Wind direction northwestGusts 47 km/hSunrise 6:42 AMSunset 7:42 PM
Saturday, Sep 12Sat Sep 12Overcast14°/8°💧 None💨 7 km/h
Daytime temperature 14°CFeels like 14°CHumidity 69%Pressure 1029 hPaCloud cover 100%Wind direction northeastGusts 6 km/hSunrise 6:44 AMSunset 7:40 PM
Sunday, Sep 13Sun Sep 13Sunny17°/7°💧 None💨 8 km/h
Daytime temperature 17°CFeels like 16°CHumidity 58%Pressure 1028 hPaCloud cover 8%Wind direction northeastGusts 7 km/hSunrise 6:46 AMSunset 7:37 PM
Monday, Sep 14Mon Sep 14Partly cloudy18°/9°💧 None💨 8 km/h
Daytime temperature 18°CFeels like 17°CHumidity 62%Pressure 1025 hPaCloud cover 30%Wind direction southwestGusts 8 km/hSunrise 6:47 AMSunset 7:35 PM
Tuesday, Sep 15Tue Sep 15Overcast18°/9°💧 None💨 30 km/h
Daytime temperature 17°CFeels like 17°CHumidity 80%Pressure 1023 hPaCloud cover 85%Wind direction westGusts 49 km/hSunrise 6:49 AMSunset 7:32 PM
Wednesday, Sep 16Wed Sep 16Light rain13°/7°💧 0.8 mm💨 23 km/h
Daytime temperature 12°CFeels like 12°CHumidity 79%Pressure 1018 hPaCloud cover 93%Wind direction northwestGusts 39 km/hSunrise 6:51 AMSunset 7:30 PM
Thursday, Sep 17Thu Sep 17Light rain14°/7°💧 1.0 mm💨 14 km/h
Daytime temperature 14°CFeels like 13°CHumidity 67%Pressure 1019 hPaCloud cover 100%Wind direction northeastGusts 28 km/hSunrise 6:52 AMSunset 7:28 PM
Friday, Sep 18Fri Sep 18Sunny15°/5°💧 None💨 13 km/h
Daytime temperature 15°CFeels like 14°CHumidity 57%Pressure 1025 hPaCloud cover 4%Wind direction northeastGusts 17 km/hSunrise 6:54 AMSunset 7:25 PM
Saturday, Sep 19Sat Sep 19Sunny16°/9°💧 None💨 9 km/h
Daytime temperature 16°CFeels like 15°CHumidity 56%Pressure 1027 hPaCloud cover 9%Wind direction northeastGusts 11 km/hSunrise 6:56 AMSunset 7:23 PM
Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.
Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.
Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.
Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.
Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.
Today's weather health advice
Open today's recommendations.
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Moderate UV risk
Sunglasses and sun protection are recommended for prolonged exposure.
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Acceptable air quality
Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.
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Comfortable temperature conditions
Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.
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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
km/h
Sustained windMax 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.