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January Weather in Casa Grande, United States

Last updated: June 24, 2025

In January, the average temperature in Casa Grande, United States hovers around 12°C (55°F). Expect minimums dipping to -1°C (30°F) and maximums reaching up to 28°C (83°F). During this time, precipitation accumulates to about 20 mm (0.8 in) over the course of 3 days, while the average humidity sits comfortably at 76%.

January Temperature in Casa Grande

In January in Casa Grande, the average temperature is 12°C (55°F). Maximums can reach 28°C (83°F) and minimums can drop as low as -1°C (30°F). This makes it a perfect time for travelers to enjoy a variety of outdoor activities while also being prepared for cooler evenings.

January Weather in Casa Grande: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Casa Grande, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Casa Grande, January typically has an average temperature of 12°C (55°F), with highs reaching up to 28°C (83°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec545765748191949388766555
Data source: Temperature data for Casa Grande 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.

January Precipitation in Casa Grande

In Casa Grande in January, the precipitation amount is 20 mm (0.8 in) accumulated over a period of 3 days.

January Precipitation Trends in Casa Grande

The chart displays monthly precipitation patterns in Casa Grande, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Casa Grande, January typically receives around 20 mm (0.8 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec202919225383621151324
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Casa Grande

In Casa Grande in January humidity is 76%. With an average temperature of 12°C (55°F), this humidity feels like a damp embrace, making traveling somewhat uncomfortable as the air clings to your skin and can leave you feeling cooler than expected.

January Average Humidity in Casa Grande

This chart illustrates the average monthly humidity levels in Casa Grande, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Casa Grande is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%79%67%55%40%33%34%48%64%67%77%82%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Casa Grande

In Casa Grande in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Casa Grande for better planning.

Maximum UV Index Levels in Casa Grande for January

The chart shows the monthly maximum UV Index (UVI) for Casa Grande in January, 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 January, the maximum UV index in Casa Grande typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469111112111110854
Data source: Casa Grande January 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 January Weather in Casa Grande Compares to Other Months

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

This table compares monthly weather conditions in Casa Grande, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (55°F)20 mm (0.8 inches)76%moderate
February Weather14°C (58°F)29 mm (1.1 inches)79%high
March Weather18°C (65°F)19 mm (0.7 inches)67%very high
April Weather24°C (75°F)1 mm (0.1 inches)55%extreme
May Weather27°C (81°F)1 mm (0.1 inches)40%extreme
June Weather33°C (92°F)5 mm (0.2 inches)33%extreme
July Weather34°C (94°F)38 mm (1.5 inches)34%extreme
August Weather34°C (94°F)36 mm (1.4 inches)48%extreme
September Weather31°C (88°F)21 mm (0.8 inches)64%very high
October Weather24°C (76°F)15 mm (0.6 inches)67%very high
November Weather19°C (66°F)13 mm (0.5 inches)77%moderate
December Weather13°C (55°F)24 mm (0.9 inches)82%moderate

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