Climate Insights for Ajo

Johnson County, Arizona, United States

Hottest
July
41°C peak
Coldest
January
9°C low
Wettest
July
24mm rain
Best to Visit
February, March, April
Mild temps & low rain

Climate Overview

The climate in Ajo is warm and mild. The average annual temperature is 24°C and approximately 137mm of precipitation falls per year. July is the wettest month, receiving around 24mm of rainfall. Ajo is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, December, February, when temperatures can drop to 9°C.

Temperature

10° 20° 30° 40° 50° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 21° Average: 14° Min: 9° Feb Max: 23° Average: 16° Min: 10° Mar Max: 26° Average: 19° Min: 13° Apr Max: 31° Average: 23° Min: 16° May Max: 33° Average: 26° Min: 19° Jun Max: 39° Average: 32° Min: 25° Jul Max: 41° Average: 34° Min: 29° Aug Max: 40° Average: 34° Min: 28° Sep Max: 38° Average: 31° Min: 25° Oct Max: 33° Average: 26° Min: 19° Nov Max: 26° Average: 19° Min: 13° Dec Max: 21° Average: 14° Min: 9°
Max
Average
Min

Temperatures in Ajo vary considerably across the year, with a 32°C difference between the coldest and warmest months. July is the hottest month, with daytime highs reaching 41°C and an average of 34°C. January is the coolest month, with minimum temperatures around 9°C and an average of 14°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 7°C shift in average temperatures.

Precipitation

0mm 25mm 50mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 18mm Feb Precipitation: 13mm Mar Precipitation: 13mm Apr Precipitation: 1mm May Precipitation: 1mm Jun Precipitation: 5mm Jul Precipitation: 24mm Aug Precipitation: 17mm Sep Precipitation: 12mm Oct Precipitation: 9mm Nov Precipitation: 7mm Dec Precipitation: 17mm
Precipitation

Ajo is a quite dry location, receiving approximately 137mm of precipitation annually, which averages out to around 11mm per month. The wettest month is July, averaging 24mm of rainfall. January and August also tend to see above-average precipitation. The driest month is May, with just 1mm. That's 22mm less than July, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Wind

0km/h 5km/h 10km/h 15km/h 20km/h 25km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 17km/h Feb Wind Speed: 19km/h Mar Wind Speed: 20km/h Apr Wind Speed: 21km/h May Wind Speed: 22km/h Jun Wind Speed: 21km/h Jul Wind Speed: 22km/h Aug Wind Speed: 20km/h Sep Wind Speed: 19km/h Oct Wind Speed: 17km/h Nov Wind Speed: 16km/h Dec Wind Speed: 16km/h
Wind Speed

Ajo is mildly breezy, with an average annual wind speed of 19km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is May, averaging 22km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in December, with average winds dropping to 16km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 6km/h between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 17km/h in winter, 21km/h in spring, 21km/h in summer, 18km/h in autumn.

Seasons

Winter
Dec 21
Spring
Mar 20
Summer
Jun 21
Autumn
Sep 23

89 days until Summer

It is currently spring in Ajo, which began on March 20, 2026. Ajo is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 41°C, while the coldest stretch bottoms out in January near 9°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

Spring

Temperatures range from 13 to 33°C. Precipitation is minimal, with only around 16mm for the entire season. Winds are moderate at around 21km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.

Summer

Temperatures range from 25 to 41°C. Precipitation is minimal, with only around 46mm for the entire season. Winds are moderate at around 21km/h. Stay hydrated, wear sun protection, and seek shade during the hottest hours of the day.

Autumn

Temperatures range from 13 to 38°C. Precipitation is minimal, with only around 27mm for the entire season. Winds are moderate at around 18km/h. Layered clothing works best as temperatures gradually cool — enjoy the crisp air and changing scenery.

Winter

Temperatures range from 9 to 23°C. Rainfall is relatively light, with around 48mm over the season and a monthly average of 16mm. Winds are moderate at around 17km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.

Best Time to Visit

Jan 14°
Feb 16°
Mar 19°
Apr 23°
May 26°
Jun 32°
Jul 34°
Aug 34°
Sep 31°
Oct 26°
Nov 19°
Dec 14°

The best time to visit Ajo is during February, March, April and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 9mm per month. By contrast, July can be uncomfortably hot with highs reaching 41°C, while January is the coldest period with lows dropping to 9°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

Monthly Climate Data

The table below shows monthly climate averages for Ajo based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
9 °C
21 °C
17 km/h
18 mm
0 cm
Feb
10 °C
23 °C
19 km/h
13 mm
0 cm
Mar Current
13 °C
26 °C
20 km/h
13 mm
0 cm
Apr
16 °C
31 °C
21 km/h
1 mm
0 cm
May
19 °C
33 °C
22 km/h
1 mm
0 cm
Jun
25 °C
39 °C
21 km/h
5 mm
0 cm
Jul
29 °C
41 °C
22 km/h
24 mm
0 cm
Aug
28 °C
40 °C
20 km/h
17 mm
0 cm
Sep
25 °C
38 °C
19 km/h
12 mm
0 cm
Oct
19 °C
33 °C
17 km/h
9 mm
0 cm
Nov
13 °C
26 °C
16 km/h
7 mm
0 cm
Dec
9 °C
21 °C
16 km/h
17 mm
0 cm
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Metric (°C, km/h)