Climate and monthly weather forecastCasa Grande, AZ
Climate and monthly weather forecast
The climate of Casa Grande
Casa Grande, located in the Sun Belt region of Arizona, USA, falls within the BWh climate classification according to the Köppen climate system. Known widely as a subtropical desert, this region is characterized by extremely low precipitation and high evaporation rates yielding long durations of dry periods. Throughout the year, Casa Grande experiences a variation in climatological parameters, adding the element of dynamism to its desert climate.Temperature patterns witness a substantial range from 46.4°F (8°C) in the coldest month to ascending highs of 102°F (38.9°C) in peak summer. From chilly winter nights to scorching summer days, Casa Grande experiences drastic temperature contrasts throughout the year. Relative humidity oscillates between 16% in the driest month to 45% in the most humid month, amplifying the dry and arid nature of the overall climate.
Rainfall patterns exhibit significant disparity with minimum rainfall noted at 0.12" (3mm) in the driest month and maximum at 1.02" (26mm) in the wettest month. The desert climate translates to a lower number of rainfall days, peaking at 10.7 days. Notably, the climate supports an abundance of daylight, ranging from 10 hours in the shorter days to 14.3 hours in the longer days. A substantial amount of sunshine hours strengthens the desert profile of Casa Grande, ranging from 6.9 hours in the least sunny months to a generous 12.2 hours in the most sunny months.
The best time to visit Casa Grande
Considering the climatological parameters, the best time to visit Casa Grande would be in the Spring months. During this time, the city experiences clear skies with cloud coverage of mere 15%. The temperatures sway between a comfortable 55°F (12.8°C) to 82.9°F (28.3°C). Sunlight is ample with an average of around 12 to 13 hours a day, complemented with relative humidity ranging from 21% to 30%. Rainfall is comparatively low, making it the perfect time to explore Casa Grande's desert beauty without worrying about sudden showers.The worst time to visit Casa Grande
The peak summer months, particularly July and August can be challenging for visitors. Casa Grande experiences the desert's wrath with temperatures rising to an extreme 101.1°F (38.4°C) and 102°F (38.9°C) respectively. These months also signify an increase in rainfall with an average of 1.02" (26mm) and 0.91" (23mm). The relative humidity values also show an uptick, making it quite uncomfortable outside. The brutal conditions make these months the most unfavorable for visiting Casa Grande.Spring weather in Casa Grande
The spring season edges over the chilly winter, leading to a gradual rise in temperatures. March sees temperatures rising between 55°F (12.8°C) and 75.9°F (24.4°C). April and May witness a significant ascend with temperatures framing from 59.9°F (15.5°C) to 90.7°F (32.6°C), an indication of the approaching summer. The dry air continues to prevail with relative humidity of 21% to 30%. The rainfall days show a downward trend, making spring the ideal time for outdoor activities.Summer weather in Casa Grande
Summer in Casa Grande is a trial of endurance with June introducing the scorching temperatures ranging from 75.4°F (24.1°C) to 101.8°F (38.8°C). July and August maintain this heat wave with temperatures soaring to an extreme 102°F (38.9°C) and 101.1°F (38.4°C). Despite being the wettest months, the rainfall only averages around 1.02" (26mm) and 0.91" (23mm). The sky remains relatively clear with sunlight strongly shining for about 11.9 to 12.2 hours a day.Autumn weather in Casa Grande
Autumn in Casa Grande witnesses a relief from the harsh summer with decreasing temperatures. September maintains a balance between 77.2°F (25.1°C) to 95.9°F (35.5°C). A significant temperature drop is seen in October and November with the mercury fluctuating from 65.7°F (18.7°C) to 84.9°F (29.4°C) and 54.7°F (12.6°C) to 73.2°F (22.9°C). The rainfall, however, remains minimal, providing a pleasantly cool climatic experience.Winter weather in Casa Grande
Winter ushers in a chilly phase for Casa Grande with December recording temperatures between 46.8°F (8.2°C) and 62.6°F (17°C). Despite being the coldest months, sunny days prevail with daylight hours ranging from 10 to 10.5. The city barely experiences rainfall, maintaining its dry and arid desert climate. Clear skies with minimal cloud coverage of about 18% to 21%, make winters in Casa Grande a perfect time for nature observing.Weather in January
The weather in Casa Grande, Arizona starts the year with milder temperatures and an increased relative humidity, laying a stark contrast to the arid climate it is typically known for. The arrival of January signals not only the new year but also a season of relative coolness, providing residents with a time of reprieve from the usual summer heat. Weather in January »Weather in February
By February, Casa Grande's weather showcases a slight elevation in temperatures, albeit remaining cool, perfectly setting a serene ambiance for the city's annual Cotton Days festival. Upon comparison with January, the daytime gradually lengthens to 11 hours while witnessing an enhanced number of sunshine days in the month. Weather in February »Weather in March
As March sets in, Casa Grande witnesses a notable shift in weather patterns, marking the transition from winter to spring. The increase in temperatures and daylight hours provide a prelude to the warmer months ahead. The city's weather retracts to its accustomed aridity with a plummeting of relative humidity from 40% down to 30%. Weather in March »Weather in April
The fourth month of the year witnesses a perceptible surge in temperatures, fully embracing the arrival of spring in Casa Grande. The city basks in a maximum 13 hours of daylight, resulting in longer, sunlit days to enjoy the outdoors. Weather in April »Weather in May
Casa Grande gets a taste of summer in May, with noticeable elevations in temperatures and a generous increase in sunshine hours. The atmospheric pressure drops further to 29.84in, while the daylight hours stretch to nearly 14 hours. Weather in May »Weather in June
June brings extreme high temperatures to Casa Grande, marking the zenith of the summer season. It's the time of the year when the city experiences its longest days of approximately 14.3 hours of daylight, with reduced visibility due to the summer haze. Weather in June »Weather in July
July continues to uphold the summer heat in Casa Grande, barely retreating from the heat intensity seen in June. This month witnesses a gradual amelioration in weather conditions with a slight increase in rainfall, providing a slight breather from the unforgiving desert heat. Weather in July »Weather in August
August carries on the strong summer tradition in Casa Grande, with weather conditions staying consistent. The scorching sun shines down on the city for 13.3 daylight hours, contributing to the continuation of high temperatures from the preceding months. Weather in August »Weather in September
September in Casa Grande signals a gradual conclusion of the summer season, with a reassuring fall in temperatures. This month witnesses a relative increase in rainfall, a pattern that continues on to October. However, the percentage of cloud cover remains nearly unchanged at 11% compared to August's 13%. Weather in September »Weather in October
With the arrival of October, Casa Grande experiences discernable relief from the severe summer heat, embarking on a journey towards cooler climatic conditions characterizing the desert autumns. The days shorten to nearly 11.3 hours of daylight, paving the way for more pleasant weather. Weather in October »Weather in November
November is a time of significant meteorological change in Casa Grande. The shift from the warm autumn to the cold winter conditions becomes more noticeable in November, with declining temperatures and a gradual increase in humidity levels. Weather in November »Weather in December
Rounding up the year is December, bringing along with it the coldest conditions Casa Grande experiences annually. It is characterized by a significant drop in temperatures and the highest humidity level seen throughout the year. Weather in December »Updated: Aug 5, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Throughout the year, there are 59.1 rainfall days, and 7.36" (187mm) of precipitation is accumulated.
With an average relative humidity of 16%, June is the least humid month.
June is the month with the least rainfall. Rain falls for 1.8 days and accumulates 0.12" (3mm) of precipitation.
With an average of 14h and 18min of daylight, June has the longest days of the year.
June has the most sunshine of the year, with an average of 12.2h of sunshine.
June through August, with an average maximum UV index of 8, are months with the highest UV index in Casa Grande.
In Casa Grande, the average temperatures in July are the highest, with a peak at 102°F (38.9°C) and a low of 82.6°F (28.1°C).
July is the month with the most rainfall in Casa Grande. Rain falls for 10.7 days and accumulates 1.02" (26mm) of precipitation.
With its average high temperature of 62.6°F (17°C) and a low of 46.8°F (8.2°C), December is regarded as the coldest month.
With an average relative humidity of 45%, December is the most humid month in Casa Grande.
The month with the shortest days is December, with an average of 10h and 0min of daylight.
Casa Grande does not observe Daylight Saving Time (DST). MST timezone is used over the entire year.
With an average of 6.9h of sunshine, December has the least sunshine of the year.
With an average maximum UV index of 3, December is the month with the lowest UV index.
Average temperature
Casa Grande, AZ
The warmest month (with the highest average high temperature) is July (102°F).
The month with the lowest average high temperature is December (62.6°F).
The month with the highest average low temperature is August (82.9°F).
The coldest month (with the lowest average low temperature) is January (46.4°F).
Average pressure
Casa Grande, AZ
- Average pressure in January:
30.08"Hg - Average pressure in February:
30.01"Hg - Average pressure in March:
29.96"Hg - Average pressure in April:
29.88"Hg - Average pressure in May:
29.84"Hg - Average pressure in June:
29.81"Hg
- Average pressure in July:
29.87"Hg - Average pressure in August:
29.86"Hg - Average pressure in September:
29.86"Hg - Average pressure in October:
29.91"Hg - Average pressure in November:
30.01"Hg - Average pressure in December:
30.05"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.81"Hg).
Average wind speed
Casa Grande, AZ
- Average wind speed in January:
4.9mph - Average wind speed in February:
5.3mph - Average wind speed in March:
6mph - Average wind speed in April:
7.1mph - Average wind speed in May:
7.1mph - Average wind speed in June:
6.6mph
- Average wind speed in July:
6.2mph - Average wind speed in August:
5.3mph - Average wind speed in September:
5.5mph - Average wind speed in October:
5.4mph - Average wind speed in November:
5.5mph - Average wind speed in December:
4.9mph
The windiest months (with the highest average wind speed) are April and May (7.1mph).
The calmest months (with the lowest average wind speed) are January and December (4.9mph).
Average humidity
Casa Grande, AZ
The month with the highest relative humidity is December (45%).
The month with the lowest relative humidity is June (16%).
Average rainfall
Casa Grande, AZ
- Average rainfall in January:
0.63" - Average rainfall in February:
0.79" - Average rainfall in March:
0.47" - Average rainfall in April:
0.16" - Average rainfall in May:
0.16" - Average rainfall in June:
0.12"
- Average rainfall in July:
1.02" - Average rainfall in August:
0.91" - Average rainfall in September:
0.91" - Average rainfall in October:
0.87" - Average rainfall in November:
0.47" - Average rainfall in December:
0.87"
The wettest month (with the highest rainfall) is July (1.02").
The driest month (with the least rainfall) is June (0.12").
Average rainfall days
Casa Grande, AZ
- Average rainfall days in January:
4.3 days - Average rainfall days in February:
4 days - Average rainfall days in March:
3.3 days - Average rainfall days in April:
2.4 days - Average rainfall days in May:
2.2 days - Average rainfall days in June:
1.8 days
- Average rainfall days in July:
10.7 days - Average rainfall days in August:
10.2 days - Average rainfall days in September:
7.5 days - Average rainfall days in October:
3.7 days - Average rainfall days in November:
2.6 days - Average rainfall days in December:
6.4 days
The month with the highest number of rainy days is July (10.7 days).
The month with the least rainy days is June (1.8 days).
Average daylight / Average sunshine
Casa Grande, AZ
- Average daylight in January:
10h and 18min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 0min - Average daylight in May:
13h and 54min - Average daylight in June:
14h and 18min
- Average daylight in July:
14h and 6min - Average daylight in August:
13h and 18min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 24min - Average daylight in November:
10h and 30min - Average daylight in December:
10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January:
7h and 0min - Average sunshine in February:
9h and 0min - Average sunshine in March:
9h and 18min - Average sunshine in April:
10h and 48min - Average sunshine in May:
11h and 54min - Average sunshine in June:
12h and 12min
- Average sunshine in July:
11h and 54min - Average sunshine in August:
12h and 0min - Average sunshine in September:
9h and 42min - Average sunshine in October:
8h and 6min - Average sunshine in November:
7h and 18min - Average sunshine in December:
6h and 54min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days
Casa Grande, AZ
- Average sunshine days in January:
26.1 days - Average sunshine days in February:
23.6 days - Average sunshine days in March:
28.3 days - Average sunshine days in April:
27.6 days - Average sunshine days in May:
28.4 days - Average sunshine days in June:
27.7 days
- Average sunshine days in July:
15.4 days - Average sunshine days in August:
16.8 days - Average sunshine days in September:
19.5 days - Average sunshine days in October:
26 days - Average sunshine days in November:
26.9 days - Average sunshine days in December:
24.3 days
The month with the most sunshine days is May (28.4 days).
The month with the least sunshine days is July (15.4 days).
Average UV index
Casa Grande, AZ
The months with the highest UV index are June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover
Casa Grande, AZ
The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 6).
Average visibility
Casa Grande, AZ
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
