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June Weather in Mercersburg, United States

Last updated: June 24, 2025

In Mercersburg, United States, the average temperature in June is a pleasant 22°C (72°F). However, you can expect temperatures to range from a cool 7°C (45°F) to a warm 35°C (95°F). During this month, precipitation averages 105 mm (4.1 in) over 11 days, contributing to a relatively high humidity level of 79%.

June Temperature in Mercersburg

In June in Mercersburg, the average temperature is 22°C (72°F). The maximum can reach 35°C (95°F), while the minimum can drop to as low as 7°C (45°F). This diverse temperature range makes it a perfect time for travelers to enjoy both warm days and cooler evenings while exploring the sights.

June Weather in Mercersburg: Daily Temperature Highs, Lows, and Averages

The chart illustrates June temperature patterns in Mercersburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mercersburg, June typically has an average temperature of 22°C (72°F), with highs reaching up to 35°C (95°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec333743546472787569594437
Data source: Temperature data for Mercersburg 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.

June Precipitation in Mercersburg

In Mercersburg in June, the precipitation amount is 105 mm (4.1 in) over the course of 11 days.

June Precipitation Trends in Mercersburg

The chart displays monthly precipitation patterns in Mercersburg, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Mercersburg, June typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec6396871071261051301071221107696
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in Mercersburg

In Mercersburg in June humidity is 79%. With an average temperature of 22°C (72°F), this humidity feels like you are enveloped in a warm, heavy blanket, making it feel considerably hotter and adding a layer of stickiness to your skin as you navigate through the streets.

June Average Humidity in Mercersburg

This chart illustrates the average monthly humidity levels in Mercersburg, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Mercersburg is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Mercersburg

In Mercersburg in June, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Mercersburg.

Maximum UV Index Levels in Mercersburg for June

The chart shows the monthly maximum UV Index (UVI) for Mercersburg in June, 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 June, the maximum UV index in Mercersburg typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098743
Data source: Mercersburg June 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 June Weather in Mercersburg Compares to Other Months

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

This table compares monthly weather conditions in Mercersburg, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)63 mm (2.5 inches)86%moderate
February Weather3°C (37°F)95 mm (3.8 inches)86%moderate
March Weather6°C (43°F)87 mm (3.4 inches)86%high
April Weather12°C (54°F)107 mm (4.2 inches)84%very high
May Weather18°C (64°F)126 mm (5.0 inches)78%very high
June Weather22°C (72°F)105 mm (4.1 inches)79%very high
July Weather25°C (78°F)130 mm (5.1 inches)70%very high
August Weather24°C (75°F)107 mm (4.2 inches)59%very high
September Weather21°C (69°F)122 mm (4.8 inches)68%very high
October Weather15°C (59°F)110 mm (4.3 inches)80%high
November Weather6°C (44°F)76 mm (3.0 inches)86%moderate
December Weather3°C (38°F)96 mm (3.8 inches)85%moderate

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