Pima County Weather Forecast
Pima County weather: 86°F, overcast. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Pima County weather in May
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.
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).
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 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.
- Avoid exposed ridgelines, small boats and rooftop viewpoints while gusts stay above 31 mph.
- If your dates are flexible, avoid January, July and September - historically the least comfortable months here.
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 |
See the Pima County forecast by time range
Pima County weather - more answers
Explore Pima County
Every topic we hold for this place, and the same topic for the places around it.
Weather 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 86°F (30°C) with overcast. Humidity is 42% and wind is 5 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 1:17 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 24, 2026 at 1:17 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
