May Weather in Greeley, United States

Last updated: June 24, 2025

In May, the average temperature in Greeley, United States is a mild 14°C (58°F). However, temperatures can vary significantly, with lows dipping to -1°C (31°F) and highs soaring to 33°C (91°F). Expect 95 mm (3.8 in) of precipitation over about 12 days, alongside an average humidity level of 74%.

May Temperature in Greeley

In May in Greeley, the average temperature is 14°C (58°F), with maximums reaching 33°C (91°F) and minimums dropping to as low as -1°C (31°F). This varied climate makes Greeley a destination where travelers should pack for both warm days and cool nights.

May Weather in Greeley: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Greeley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Greeley, May typically has an average temperature of 14°C (58°F), with highs reaching up to 33°C (91°F) and lows dropping to around -1°C (31°F).

Data source: Temperature data for Greeley generated using information from the Copernicus Climate Change Service.

May Precipitation in Greeley

In Greeley in May, the precipitation amount is 95 mm (3.8 in) spread over 12 days.

May Precipitation Trends in Greeley

The chart displays monthly precipitation patterns in Greeley, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Greeley, May typically receives around 95 mm (3.8 inches) of precipitation spread over approximately 12 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

May Humidity in Greeley

In Greeley in May humidity is 74%. With an average temperature of 14°C (58°F), this humidity feels like a thick blanket wrapping around you, making outdoor activities slightly uncomfortable and prompting travelers to seek shade or indoor venues more often.

May Average Humidity in Greeley

This chart illustrates the average monthly humidity levels in Greeley, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Greeley is approximately 74%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Greeley

In Greeley in May, 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 Greeley.

Maximum UV Index Levels in Greeley for May

The chart shows the monthly maximum UV Index (UVI) for Greeley in May, 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 May, the maximum UV index in Greeley typically reaches 10, which falls under the very high exposure category.

Data source: Greeley May 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 May Weather in Greeley Compares to Other Months

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

This table compares monthly weather conditions in Greeley, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (31°F)	11 mm (0.4 inches)	72%	moderate
February Weather	-1°C (30°F)	13 mm (0.5 inches)	76%	moderate
March Weather	5°C (42°F)	44 mm (1.7 inches)	61%	high
April Weather	9°C (49°F)	35 mm (1.4 inches)	60%	very high
May Weather	14°C (58°F)	95 mm (3.8 inches)	74%	very high
June Weather	21°C (71°F)	34 mm (1.3 inches)	82%	extreme
July Weather	25°C (77°F)	30 mm (1.2 inches)	82%	extreme
August Weather	23°C (74°F)	32 mm (1.3 inches)	84%	very high
September Weather	20°C (68°F)	15 mm (0.6 inches)	75%	very high
October Weather	10°C (49°F)	24 mm (0.9 inches)	73%	high
November Weather	5°C (41°F)	15 mm (0.6 inches)	74%	moderate
December Weather	0°C (33°F)	10 mm (0.4 inches)	77%	moderate