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Park climate1991–2020 climate normals11 m source elevationNASA POWER

Compare twelve months at a sampled 10.92 m harbour point

Poole Harbour monthly climate across its Dorset ria, estuary, and coastal setting

Poole Harbour’s sampled mean temperature is 7.08 °C in February and 17.24 °C in August. Daily precipitation averages 1.64 mm in July and 3.40 mm in November, while wind speed measures 5.62 m/s in June and 8.69 m/s in January. The 1991–2020 NASA POWER values refer to one 10.92 m point; tides, exposure, and local weather still vary among Poole Harbour’s islands, inlets, and shores.

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Annual climate pattern

Long-term monthly temperature cycles and average daily precipitation trends across twelve months

Poole Harbour Annual Climate Normals, Monthly Average Temperatures and Precipitation Patterns

Average minimum, mean, and maximum temperatures track a steady annual cycle from cooler winter months to peak warmth in summer at the representative coordinate. Average daily precipitation rates shift across the calendar year based on historical climate records spanning 1991 to 2020.
Mean temperatureAverage minimum–maximum rangePrecipitation
Temperature (°C)PrecipitationUp to 3.4 mm/day0°5°10°15°20°25°8°7°8°9°12°14°17°17°16°14°11°9°012342.92.41.91.91.71.81.622.133.43.3JanFebMarAprMayJunJulAugSepOctNovDec
Annual mean
11.8 °C
Warmest month
August
Coolest month
February
Wettest month
November
Twelve-month climate

Compare long term temperature bounds, average daily precipitation rates, humidity, wind, and calculated daylight across the annual cycle.

Poole Harbour Monthly Climate and Weather Patterns Across Twelve Calendar Months

Evaluating twelve distinct monthly records across a representative coordinate reveals how temperature bounds and average daily precipitation shift throughout the year. Examining humidity, wind speed, and calculated daylight alongside these core signals provides a complete climatological baseline for Poole Harbour.
Mean temperaturePrecipitationHumidityWind speedDaylight
January7.7 °C2.7° to 11.6°2.9 mm/day85.8%8.7 m/s8.3 hours
February7.1 °C2.1° to 10.7°2.4 mm/day86%8 m/s9.8 hours
March7.8 °C3.2° to 11.8°1.9 mm/day86.4%7.2 m/s11.6 hours
April9.4 °C4.3° to 14.4°1.9 mm/day85%6.3 m/s13.6 hours
May11.9 °C7° to 17.4°1.7 mm/day84.5%6 m/s15.3 hours
June14.5 °C10.3° to 19.3°1.8 mm/day84.3%5.6 m/s16.2 hours
July16.6 °C13° to 21.4°1.6 mm/day84%5.7 m/s15.8 hours
August17.2 °C13.6° to 21.4°2 mm/day83.1%5.9 m/s14.3 hours
September16.1 °C11.9° to 19.8°2.1 mm/day81.9%6.6 m/s12.3 hours
October13.9 °C8.9° to 17.5°3 mm/day82.6%7.8 m/s10.4 hours
November10.9 °C5.8° to 15.2°3.4 mm/day84%8.1 m/s8.7 hours
December8.7 °C3.6° to 12.8°3.3 mm/day85.5%8.6 m/s7.8 hours

Compare two months

See two months side by side and how much they differ. Both use the same 1991–2020 climate normals and NASA POWER data point as the table above, so they show typical conditions, not a forecast.

Mean temperature
February: 7.1 °C
August: 17.2 °C
Change from February to August: +10.2 °C
Precipitation
February: 2.4 mm/day
August: 2 mm/day
Change from February to August: -0.4 mm/day
Daylight
February: 9.8 hours
August: 14.3 hours
Change from February to August: +4.5 hours
Calculated climate highlights

Long-term monthly averages for temperature, precipitation, wind, and daylight duration

Calculated Monthly Climate Highlights and Comparative Extremes for Poole Harbour

Comparative monthly values derived from stored climatology records identify the warmest, coolest, wettest, and windiest points across the annual cycle at Poole Harbour. These calculated highlights summarize multi-year average patterns rather than functioning as observed weather records or localized site conditions.
Warmest month
August17.2 °C
Coolest month
February7.1 °C
Wettest month
November3.4 mm/day
Driest month
July1.6 mm/day
Most humid month
March86.4%
Windiest month
January8.7 m/s
Longest daylight
June16.2 hours

Interactive climate map

National park climate map

Open the climate map to compare monthly temperature, precipitation, and other averages.

Global National Park Climate Map
Other park climates

Explore monthly temperature, precipitation, and wind patterns across diverse protected landscapes

Comparing Poole Harbour Climate Normals With Other Protected Areas

Standardized monthly climate profiles allow readers to examine long-term temperature, precipitation, and wind patterns across different protected landscapes. Evaluating these atmospheric records side by side reveals distinct geographic variations without assuming shared environmental conditions.
A pale, abstract watercolor painting depicting gentle hills, a line of trees, and a waterway in muted greens, yellows, and soft pinks.
Climate profileUnited Kingdom

The Needles

Annual mean
11.8 °C
Warmest month
August
Wettest month
November
View The Needles climate
MoriAtlas Explorer

Explore the Geography and Protected Landscape of Poole Harbour

Investigate the complex topography of Poole Harbour, where marine and riverine influences converge. Utilize the MoriAtlas dataset to understand the spatial distribution of this major coastal wetland, from its shallow channels and islands to the surrounding heathland and chalk ridges of the Dorset region.

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Poole Harbour Protected Area Geography

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