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Park climate1991–2020 climate normals251 m source elevationNASA POWER

Long-term temperature, precipitation, and daylight data for a representative Welsh location.

Snowdonia National Park Monthly Climate Normals: Twelve-Month Atmospheric Analysis

Review established monthly climate patterns for Snowdonia National Park based on 1991 to 2020 longitudinal data. This profile provides an objective set of atmospheric measurements including mean, minimum, and maximum temperatures; daily precipitation; relative humidity; wind speeds; and average daylight hours at a single representative coordinate. These statistics characterize long-term climate behavior rather than current weather or site-wide conditions.

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Annual climate pattern

Tracing thirty years of average thermal ranges and monthly precipitation cycles

Annual Temperature Patterns and Monthly Climate Normals in Snowdonia National Park

At a representative elevation of 251 meters, monthly mean temperatures in Snowdonia National Park range from a low of 3.74 degrees Celsius in February to a peak of 14.44 degrees Celsius in July. Average daily precipitation drops to 2.71 millimeters in May before rising to 4.72 millimeters in December, defining the baseline annual moisture pattern.
Mean temperatureAverage minimum–maximum rangePrecipitation
Temperature (°C)PrecipitationUp to 4.7 mm/day-5°0°5°10°15°20°25°4°4°5°7°10°13°14°14°12°10°7°4°01234543.63.12.82.73.23.33.53.64.44.74.7JanFebMarAprMayJunJulAugSepOctNovDec
Annual mean
8.7 °C
Warmest month
July
Coolest month
February
Wettest month
December
Twelve-month climate

Compare average temperature bounds, precipitation rates, and calculated daylight across twelve months.

Snowdonia National Park Weather by Month: Complete Twelve Month Climate Comparison

Monthly climate records for Snowdonia National Park provide a systematic comparison of average temperature bounds, daily precipitation rates, relative humidity, wind speed, and calculated daylight. Comparing long term historical averages from the 1991 to 2020 climatology period reveals seasonal transitions at the representative elevation of 251.15 meters.
Mean temperaturePrecipitationHumidityWind speedDaylight
January3.8 °C-2.9° to 10°4 mm/day94.1%4.8 m/s8 hours
February3.7 °C-2.5° to 9.7°3.6 mm/day93%4.7 m/s9.6 hours
March5 °C-1.9° to 12.7°3.1 mm/day90.5%4.2 m/s11.6 hours
April7.1 °C-0.5° to 16°2.8 mm/day86.6%3.5 m/s13.7 hours
May10.1 °C2° to 19.8°2.7 mm/day83.6%3.4 m/s15.6 hours
June12.8 °C5.7° to 21.9°3.2 mm/day83.9%3.2 m/s16.6 hours
July14.4 °C8.1° to 22.7°3.3 mm/day85%3.1 m/s16.1 hours
August14.3 °C7.8° to 22°3.5 mm/day86.5%3.2 m/s14.4 hours
September12.5 °C6.1° to 20.2°3.6 mm/day88%3.5 m/s12.4 hours
October9.6 °C2.8° to 16.6°4.4 mm/day90.5%4 m/s10.2 hours
November6.7 °C0° to 12.9°4.7 mm/day93.2%4.2 m/s8.4 hours
December4.5 °C-2.3° to 10.9°4.7 mm/day94.3%4.5 m/s7.4 hours
Calculated climate highlights

Comparing annual cycles of temperature, precipitation, and daylight duration from long-term observations

Calculated Climate Contrasts and Monthly Highlights for Snowdonia National Park

Calculated monthly averages for Snowdonia National Park trace the relative peaks and lows of temperature, wind, humidity, and daily precipitation rates. Derived from long-term datasets at a representative elevation, comparative metrics illustrate seasonal trends without representing localized mountain microclimates or actual weather records.
Warmest month
July14.4 °C
Coolest month
February3.7 °C
Wettest month
December4.7 mm/day
Driest month
May2.7 mm/day
Most humid month
December94.3%
Windiest month
January4.8 m/s
Longest daylight
June16.6 hours

Interactive climate map

Compare National Park Climate Data Through an Interactive Global Map

Visit the MoriAtlas climate map to compare long-term monthly temperature and precipitation metrics across national parks. This visual interface helps you understand seasonal variations at specific protected area coordinates to deepen your knowledge of global park geography and environmental characteristics.

Global National Park Climate Map
Other park climates

Analyze monthly climate patterns across diverse geographic settings and regional environments

Compare Snowdonia National Park Climate Profiles with Other Protected Landscapes

Standardized monthly climate profiles of national parks in Wales and broader global regions enable systematic comparison of regional weather dynamics. Comparing long-term temperature and precipitation cycles alongside wind and daylight data highlights distinct environmental conditions across different geographic settings.
Watercolor illustration of Dartmoor moorland landscape with rolling hills, grassy vegetation, a stream, and distant mountains.
Climate profileUnited Kingdom

Dartmoor

Annual mean
10.8 °C
Warmest month
August
Wettest month
December
MoriAtlas Explorer

Continue Exploring the Protected Landscape of Snowdonia National Park

Delve deeper into the geographic context and mapped terrain of Snowdonia National Park. Understanding this iconic Welsh protected landscape provides a foundation for exploring its regional setting and the broader atlas of protected areas within the United Kingdom. Discover the patterns of protected lands and the unique geographic features that define this significant mountain region.