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July Weather in St Martin, Guernsey

Last updated: August 23, 2025

In July, the average temperature in St Martin, Guernsey is a comfortable 16°C (62°F), with a minimum of 14°C (57°F) and a maximum of 21°C (70°F). Expect 37 mm (1.5 in) of precipitation spread over 7 days, accompanied by an average humidity of 63%. Enjoy the mild weather and make the most of your time in this beautiful location!

July Temperature in St Martin

In July in St Martin, the average temperature is 16°C (62°F). Maximums can reach 21°C (70°F), while minimums can drop to as low as 14°C (57°F). This mild climate makes St Martin an ideal destination for outdoor adventures and sightseeing during this time of year.

July Weather in St Martin: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in St Martin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In St Martin, July typically has an average temperature of 16°C (62°F), with highs reaching up to 21°C (70°F) and lows dropping to around 14°C (57°F).
JanFebMarAprMayJunJulAugSepOctNovDec484848505458616362595451
Data source: Temperature data for St Martin generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

July Precipitation in St Martin

In St Martin in July, the precipitation amount is 37 mm (1.5 in) during a span of 7 days.

July Precipitation Trends in St Martin

The chart displays monthly precipitation patterns in St Martin, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In St Martin, July typically receives around 37 mm (1.5 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec948673345559375063144126163
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in St Martin

In St Martin in July, humidity is 63%. With an average temperature of 16°C (62°F), this humidity feels like a refreshing yet slightly damp embrace, making travel quite comfortable as long as you're prepared for the occasional stickiness in the air.

July Average Humidity in St Martin

This chart illustrates the average monthly humidity levels in St Martin, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in St Martin is approximately 63%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%85%84%81%77%63%71%76%89%90%90%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in St Martin

In St Martin in July, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in St Martin.

Maximum UV Index Levels in St Martin for July

The chart shows the monthly maximum UV Index (UVI) for St Martin in July, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In July, the maximum UV index in St Martin typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234679876421
Data source: St Martin July UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How July Weather in St Martin Compares to Other Months

Weather in St Martin varies notably across the year, with each month offering distinct climate conditions. This page compares July’s weather to other months in St Martin, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in St Martin, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)94 mm (3.7 inches)89%low
February Weather9°C (48°F)86 mm (3.4 inches)88%moderate
March Weather9°C (49°F)73 mm (2.9 inches)85%moderate
April Weather10°C (50°F)34 mm (1.3 inches)84%high
May Weather12°C (54°F)55 mm (2.2 inches)81%high
June Weather14°C (58°F)59 mm (2.3 inches)77%very high
July Weather16°C (62°F)37 mm (1.5 inches)63%very high
August Weather17°C (63°F)50 mm (2.0 inches)71%high
September Weather17°C (62°F)63 mm (2.5 inches)76%high
October Weather15°C (59°F)144 mm (5.7 inches)89%moderate
November Weather12°C (54°F)126 mm (5.0 inches)90%low
December Weather11°C (51°F)163 mm (6.4 inches)90%low

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