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March Weather in Johnstown, United States

Last updated: June 24, 2025

In March, the average temperature in Johnstown, United States hovers around 5°C (42°F), with lows dipping to a chilling -14°C (7°F) and highs reaching a pleasant 23°C (74°F). Expect significant precipitation, averaging 111 mm (4.4 in) over 13 days, accompanied by a high average humidity of 87%.

March Temperature in Johnstown

In March in Johnstown, the average temperature is 5°C (42°F), with maximums reaching 23°C (74°F) and minimums dropping as low as -14°C (7°F). Travelers should be prepared for a wide range of temperatures, making layered clothing essential for comfort during their visit.

March Weather in Johnstown: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Johnstown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Johnstown, March typically has an average temperature of 5°C (42°F), with highs reaching up to 23°C (74°F) and lows dropping to around -14°C (7°F).
JanFebMarAprMayJunJulAugSepOctNovDec303341516371757368574136
Data source: Temperature data for Johnstown 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.

March Precipitation in Johnstown

In Johnstown in March, the precipitation amount reaches 111 mm (4.4 in) over the course of 13 days.

March Precipitation Trends in Johnstown

The chart displays monthly precipitation patterns in Johnstown, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Johnstown, March typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec861101111251291511147688102100104
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Johnstown

In Johnstown in March humidity is 87%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and travel less inviting as the air becomes heavy and oppressive.

March Average Humidity in Johnstown

This chart illustrates the average monthly humidity levels in Johnstown, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Johnstown is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Johnstown

In Johnstown in March, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Johnstown, you can refer to this Hourly UV Index in Johnstown.

Maximum UV Index Levels in Johnstown for March

The chart shows the monthly maximum UV Index (UVI) for Johnstown in March, 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 March, the maximum UV index in Johnstown typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Johnstown March 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 March Weather in Johnstown Compares to Other Months

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

This table compares monthly weather conditions in Johnstown, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)86 mm (3.4 inches)88%moderate
February Weather1°C (34°F)110 mm (4.3 inches)87%moderate
March Weather5°C (42°F)111 mm (4.4 inches)87%high
April Weather11°C (51°F)125 mm (4.9 inches)87%very high
May Weather17°C (63°F)129 mm (5.1 inches)81%very high
June Weather22°C (71°F)151 mm (5.9 inches)82%very high
July Weather24°C (75°F)114 mm (4.5 inches)81%very high
August Weather23°C (73°F)76 mm (3.0 inches)78%very high
September Weather20°C (68°F)88 mm (3.4 inches)78%very high
October Weather14°C (57°F)102 mm (4.0 inches)82%high
November Weather5°C (41°F)100 mm (3.9 inches)89%moderate
December Weather2°C (36°F)104 mm (4.1 inches)86%low

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