Pima County Climate and Average Weather
Climate of Pima County: average temperatures, rainfall and seasons month by month.
Climate in Pima County month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 63° | 40° | 1,6 in | ★★★★☆ |
| February | 72° | 46° | 0,9 in | ★★★★☆ |
| March | 77° | 50° | 1,5 in | ★★★★☆ |
| April | 83° | 56° | 0,3 in | ★★★★★ |
| May | 91° | 63° | 0,4 in | ★★★★★ |
| June | 101° | 75° | 0,5 in | ★★★★☆ |
| July | 101° | 78° | 1,8 in | ★★★★☆ |
| August | 101° | 78° | 0,6 in | ★★★★☆ |
| September | 96° | 72° | 2,1 in | ★★★★☆ |
| October | 89° | 62° | 2,0 in | ★★★★☆ |
| November | 74° | 49° | 1,2 in | ★★★★☆ |
| December | 71° | 45° | 0,7 in | ★★★★☆ |
Climate type: Hot and arid. Source: Open-Meteo archive (ERA5).
Recent extremes in Pima County
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Pima County compares with nearby places
Annual averages, and the difference against Pima County.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Tucson | 0 mi | 72°F | about the same | 14 in |
| Saguaro National Park | 12 mi | 72°F | about the same | 11 in |
| Phoenix Sky Harbor International Airport | 103 mi | 76°F | +36°F warmer | 11 in |
| Phoenix | 106 mi | 76°F | +36°F warmer | 11 in |
| Area Code 602 | 106 mi | 76°F | +36°F warmer | 11 in |
Best time to visit Pima County
Go in February, March, April and May. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, July and September - expect the least comfortable mix of heat, cold or rain.
What this means for Pima County
Today is warmer than average for August. The forecast high of 109°F is 8.1°F above the 101°F typical for this month.
A 12% chance means most of the area stays dry; a passing shower is possible but short.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 71°F.
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- Sunglasses, a brimmed hat and SPF 30+
- Avoid long hikes after mid-morning; start at dawn or leave it for a cooler day.
- If your dates are flexible, avoid January, July and September - historically the least comfortable months here.
Summary
Pima County is a county in Arizona. Pima County is a county in the United States. It has a population of about 1.1 million.
Right now it is 96°F (36°C) in Pima County with overcast. It feels like 93°F. Today runs from 75°F to 109°F. Chance of precipitation is 12%. Sightseeing conditions score 7.5/10 - good conditions.
The best time to visit Pima County is February, March, April and May. The climate is hot and arid. January, July and September tend to be the least comfortable months. June is the warmest month with average highs near 101°F, while January is the coldest with lows near 40°F.
The closest major airport is Phoenix Sky Harbor International Airport (PHX), about 103 mi away. Nearby highlights include Saguaro National Park, Slide Rock State Park and Petrified Forest National Park.
In plain terms. Today is warmer than average for August. The forecast high of 109°F is 8.1°F above the 101°F typical for this month. The best window to be outside is roughly 7 AM to 10 AM, when temperature, rain chance and wind line up best. driving is the strongest bet in Pima County today at 8.9/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Pima County
| Type | County |
|---|---|
| State | Arizona |
| Country | United States |
| Continent | North America |
| Coordinates | 32°13′21.4″N 110°58′28.9″W (32.2226, -110.9747) |
| Population | 1.050.000 |
| Local time | 11:34 PM (UTC-07:00) |
| Best months | February, March, April and May |
| Climate | Hot and arid |
Weather map for Pima County
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Explore Pima County
Every topic we hold for this place, and the same topic for the places around it.
Climate for related places
Frequently asked questions
Where is Pima County?
Pima County is a county in Arizona. Its coordinates are 32.2226, -110.9747. It lies in North America.
What is the weather like in Pima County right now?
It is currently 96°F (36°C) with overcast. Humidity is 24% and wind is 9 mph.
When is the best time to visit Pima County?
February, March, April and May offer the most comfortable conditions in Pima County, which has a hot and arid climate. January, July and September are usually the hardest months for outdoor plans.
What time zone is Pima County in?
Pima County observes America/Phoenix (UTC-07:00). The local time is 11:34 PM.
How many people live in Pima County?
Pima County has a population of approximately 1.1 million.
What is the nearest airport to Pima County?
The closest airports are Phoenix Sky Harbor International Airport (PHX), 103 mi away.
What are the top things to do in Pima County?
Popular options include Saguaro National Park, Slide Rock State Park and Petrified Forest National Park.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (us-counties) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 22, 2026 at 11:34 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
