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Park climate1991–2020 climate normals12 m source elevationNASA POWER

Review long-term averages for temperature, precipitation, wind, and daylight cycles.

Réserve naturelle nationale de la dune Marchand: Monthly Climate Normals and Data Trends

The climate profile for Réserve naturelle nationale de la dune Marchand tracks monthly atmospheric patterns derived from 1991-2020 NASA POWER data at a single representative coordinate. These records define annual cycles in temperature, precipitation rates, relative humidity, wind speed, and daylight hours. Analysis relies exclusively on long-term climate normals, providing a foundational baseline for understanding atmospheric rhythm at this location.

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A flat, vector-style illustration of a landscape with sand dunes, green grassy slopes, a winding blue stream, and a soft morning sky with clouds.
Annual climate pattern

Long-term monthly temperature normals and average daily precipitation rates across twelve months

Réserve naturelle nationale de la dune Marchand Annual Climate and Temperature Patterns

Average minimum, mean, and maximum temperatures track a steady twelve-month thermal progression across the protected landscape, with monthly averages peaking during summer and dropping through winter. Corresponding average daily precipitation rates fluctuate across the year based on NASA Power climatology records gathered from a representative coordinate at an elevation of 11.83 meters.
Mean temperatureAverage minimum–maximum rangePrecipitation
Temperature (°C)PrecipitationUp to 2.7 mm/day-10°0°10°20°30°4°4°7°9°13°15°17°18°15°12°8°5°012321.91.61.41.822.12.22.12.42.72.6JanFebMarAprMayJunJulAugSepOctNovDec
Annual mean
10.7 °C
Warmest month
August
Coolest month
January
Wettest month
November
Twelve-month climate

Track average monthly temperature bounds, daily precipitation rates, wind speeds, and calculated daylight hours across the calendar year.

Réserve naturelle nationale de la dune Marchand Weather by Month: Twelve-Month Climate Comparison

Analyzing twelve distinct monthly records across a representative coordinate reveals long-term temperature patterns and precipitation rates without relying on single annual averages. Comparing relative humidity, wind speed, and calculated daylight hours alongside thermal bounds provides a complete baseline of regional climatic normals.
Mean temperaturePrecipitationHumidityWind speedDaylight
January4.3 °C-3.8° to 11.4°2 mm/day90.6%6.7 m/s8.2 hours
February4.5 °C-3° to 12°1.9 mm/day88%6.4 m/s9.7 hours
March6.6 °C-0.8° to 15.5°1.6 mm/day85.3%5.8 m/s11.6 hours
April9.2 °C1.2° to 19.3°1.4 mm/day81.7%5 m/s13.6 hours
May12.5 °C4.7° to 22.6°1.8 mm/day80.8%4.9 m/s15.3 hours
June15.3 °C8.3° to 25.5°2 mm/day81.1%4.7 m/s16.2 hours
July17.5 °C10.8° to 27.1°2.1 mm/day81.1%4.6 m/s15.8 hours
August17.7 °C11.5° to 27.1°2.2 mm/day81%4.6 m/s14.3 hours
September15.3 °C8.6° to 23.4°2.1 mm/day82.6%5.1 m/s12.3 hours
October11.9 °C4° to 20.1°2.4 mm/day85.6%5.8 m/s10.3 hours
November8 °C0.7° to 15.6°2.7 mm/day89.5%6.1 m/s8.6 hours
December5.1 °C-2.6° to 12.3°2.6 mm/day91.2%6.5 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
January: 4.3 °C
August: 17.7 °C
Change from January to August: +13.4 °C
Precipitation
January: 2 mm/day
August: 2.2 mm/day
Change from January to August: +0.2 mm/day
Daylight
January: 8.2 hours
August: 14.3 hours
Change from January to August: +6 hours
Calculated climate highlights

Comparative monthly averages for temperature, precipitation, humidity, wind, and daylight duration across the reserve

Calculated Monthly Climate Highlights and Extremes for Réserve naturelle nationale de la dune Marchand

Calculated monthly comparisons highlight the warmest, coolest, wettest, and windiest periods derived from long-term averages at a representative coordinate within Réserve naturelle nationale de la dune Marchand. Stored climatology records summarize relative shifts across twelve annual intervals without equating to observed weather extremes or localized anomalies.
Warmest month
August17.7 °C
Coolest month
January4.3 °C
Wettest month
November2.7 mm/day
Driest month
April1.4 mm/day
Most humid month
December91.2%
Windiest month
January6.7 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

Analyze monthly weather patterns across diverse protected landscapes and geographic settings.

Beyond Réserve naturelle nationale de la dune Marchand: Compare Other Park Climate Profiles

Examine long-term monthly temperature, precipitation, humidity, wind, and daylight records across various protected natural areas. Systematic comparison of atmospheric normals reveals broad geographic contrast and environmental diversity between different conservation landscapes.
MoriAtlas Explorer

Trace the Protected Boundaries of the Réserve naturelle nationale de la dune Marchand

Continue exploring the intricate coastal geography and protected Flemish dune ecosystems of the Réserve naturelle nationale de la dune Marchand. Use MoriAtlas to examine how these rare habitats connect within the wider conservation landscape of Hauts-de-France and the North Sea shoreline.

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