Tucson, AZ Weather Forecast
Pima County, Arizona
Seven-day outlook
51–85°F across the weekThe week runs between 51° and 84°, with today the warmest day of it. The second half leans cooling, and Sunday is the coolest day in it. Sunday is the wettest day, peaking near 86%. 3 of the 7 days stay dry.
Forecasts come from the National Weather Service's own computer models, and current conditions from the nearest reporting weather station. Both are served through the weather API. A forecast is guidance, not a warning, and anything the Weather Service has actually issued is on the live map.
The written summaries on this page are generated from the forecast data above, not by a meteorologist. Each sentence is a reading of the same numbers you can see, and no forecaster has reviewed them.
About the Tucson forecast
Tucson sits at 32.1530°N, 110.8708°W in Pima County, Arizona. The forecast above is drawn for that point from the National Weather Service's own computer models: a seven-day outlook, and a finer-grained one covering the next eighteen hours where it reaches, and the radar and alert panels show what the Weather Service has out over the area right now.
- County
- Pima County
- Coordinates
- 32.1530°N, 110.8708°W
- Population
- 547,239 · 2023 estimate
- Land area
- 242.187 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Tucson, and the forecast is for that location, not for every address inside the city limits, and a large city can have real weather differences from one side to the other.
How well can the network see Tucson?
The nearest Doppler radar is KEMX (Tucson, AZ), 23 miles to the SE. A WSR-88D's lowest routine scan sits half a degree above horizontal, and the earth curves away beneath it, so by the time that beam reaches Tucson its center is about 1,300 ft above ground. That is about as close as radar coverage gets in the United States: the lowest scan is still near the ground when it reaches Tucson, so low-level rotation and the leading edge of a gust front show up on it. Tucson is closer to its radar than 81% of US cities.
The closest instrument actually measuring the air is KDMA · Tucson/Davis AFB on the ASOS/AWOS network, 1.3 miles away. Close enough that its readings are, for practical purposes, the conditions in town.
Beam height is the standard 4/3-earth approximation for the 0.5° scan and assumes normal refraction; it is where the center of the beam is, not its edges, and unusual temperature profiles bend it. Radar siting from the NWS WSR-88D network, station positions from the Arizona observing network as of this build.
Forecasts near Tucson
- South Tucson, AZ6 mi
- Sahuarita, AZ16 mi
- Oro Valley, AZ20 mi
- Marana, AZ27 mi
- Benson, AZ36 mi
- Sierra Vista, AZ52 mi
- Nogales, AZ55 mi
- Eloy, AZ59 mi
Elsewhere in Arizona
PhoenixMesaChandlerGilbertGlendaleScottsdaleAll Arizona forecasts →