Tucson, Arizona, offers a subtropical semi-desert climate that entices visitors and residents with its distinct seasons.
Located in the southwest of the United States, Tucson experiences very mild winters and extremely hot summers.
In the peak of summer, temperatures can reach an average high of 100°F in July, while winters are much more moderate, with temperatures rarely dropping below 42°F.
The weather conditions in Tucson are marked by abundant sunshine year-round, but summer monsoon rains bring occasional humidity.
The dry air from the desert and the altitude of 2,450 feet contribute to the unique weather patterns in this region.
Tucson sits 140 miles away from the Gulf of California, allowing some humid air masses to influence the local climate.
Due to its favorable weather, Tucson is a popular destination for those seeking outdoor activities and sunny skies.
Even in the cooler months, with daily highs below 72°F, the city enjoys reduced daylight hours but still plenty of sunshine.
This combination of factors makes the climate in Tucson ideal for a range of activities throughout the year.
Average Temperature in Tucson, Arizona
Tucson, Arizona experiences hot summers and mild winters.
In January, the average high temperature is 68°F, while the average low is 41°F.
February is slightly warmer, with average temperatures ranging from 70°F during the day to 43°F at night.
By March, temperatures continue to rise, with an average high of 78°F and a low of 49°F.
April sees further increases, with daytime highs reaching 85°F and nighttime lows around 55°F.
In May, expect average highs of 94°F and lows of 63°F.
June marks the beginning of extreme heat, with average highs soaring to 100°F and lows around 73°F.
The hottest month of the year is July, with an average high of 100°F and a low of 77°F.
In August, temperatures remain high, averaging 98°F during the day and 76°F at night.
September sees a slight decrease in heat, with highs around 94°F and lows near 70°F.
October brings milder weather, with highs averaging 84°F and lows around 59°F.
In November, temperatures cool further, with highs of 72°F and lows near 47°F.
December is the coldest month, with average highs of 66°F and lows of 43°F year-round.
Rainfall is minimal, and freezing temperatures are rare.
Tucson has many days above 100 degrees Fahrenheit, with most of these occurring between June and September.
Average Precipitation in Tucson, Arizona
Tucson experiences both rainy and dry periods throughout the year, with specific months notable for higher or lower precipitation levels.
Average Rainfall in Tucson, Arizona
Rainfall in Tucson is irregular, with the city receiving around 12 inches of rain annually.
The wettest month is usually July, coinciding with the monsoon season. During this time, heavy thunderstorms can cause sudden spikes in precipitation.
Rainfall slows down in the fall but occasionally picks up again in the winter.
Despite the short bursts, the desert climate means many months see little to no rain. Lists and tables help clarify the data:
- January: 0.9 inches
- July: 2.4 inches
- October: 1.0 inches
The variability is significant, with much of the annual rain concentrated in a few months.
Average Snow in Tucson, Arizona
Snow is rare in Tucson due to its desert climate. The city sees an average of just 0.1 inches of snow annually.
Snowfall is more likely in the higher elevations around Tucson, where temperatures drop lower during the winter.
In rare instances, snow may fall in the city itself, usually melting quickly.
For those interested in snow and ice occurrences, additional information can be found in articles about snow and ice.
Snowfall varies significantly from year to year, with some winters experiencing no snow at all.
Average Sun in Tucson, Arizona
Tucson experiences abundant sunshine throughout the year with clear, sunny skies being a notable feature. The region enjoys high solar energy, which contributes to its warm climate.
Average Daily Shortwave Solar Energy in Tucson, Arizona
Tucson’s average daily shortwave solar energy is one of the highest in the U.S. The area receives about 6.7 kWh/m² per day on average.
During summer, the solar energy peaks due to longer daylight hours, with June and July seeing the highest values.
In contrast, winter months like December experience lower energy values, around 4.7 kWh/m² per day.
This high solar energy contributes to Tucson’s sunny days, frequent clear skies, and warm temperatures.
The city’s location in the desert southwest plays a significant role in its high sun exposure.
Tucson also benefits from longer daylight hours, especially in summer.
Typical summer days see sunrise around 5:20 AM and sunset close to 7:45 PM.
Winter days are shorter, with sunrise around 7:15 AM and sunset around 5:20 PM.
Average Humidity in Tucson, Arizona
Tucson experiences varying levels of humidity throughout the year.
December is typically the most humid month with an average relative humidity of 50%. On the other hand, June has the lowest average humidity at 21% (source).
The average annual relative humidity in Tucson is around 38%. This means that even during the most humid times, the air still feels relatively dry compared to other regions.
| Month | Average Humidity (%) |
|---|---|
| January | 40% |
| February | 35% |
| March | 29% |
| April | 24% |
| May | 20% |
| June | 21% |
| July | 30% |
| August | 35% |
| September | 39% |
| October | 42% |
| November | 45% |
| December | 50% |
Dew points in Tucson tend to remain low due to the arid climate.
This contributes to a generally comfortable and dry atmosphere, except during the monsoon season when slight increases can be felt.
Average Wind in Tucson, Arizona
In Tucson, the average wind speed varies throughout the year.
Spring Months (March to May):
During spring, wind speeds are generally higher. March is one of the windiest months with averages around 8-10 mph. The wind gradually decreases towards May.
Summer Months (June to August):
Summers in Tucson see slightly lower wind speeds, usually averaging between 6-8 mph. Despite the intense heat, the wind helps a bit in making the temperatures more bearable.
Fall Months (September to November):
In fall, the wind speeds pick up again. October shows averages close to 7-9 mph, contributing to a more comfortable climate as temperatures start to drop.
Winter Months (December to February):
Winter months have the least wind. January’s wind speeds are lower, averaging around 5-7 mph.
Cooler temperatures combined with these winds can make the evenings and mornings feel chillier.
| Month | Wind Speed (mph) |
|---|---|
| January | 5-7 |
| February | 6-8 |
| March | 8-10 |
| April | 9-11 |
| May | 7-9 |
| June | 6-8 |
| July | 6-8 |
| August | 6-8 |
| September | 7-9 |
| October | 7-9 |
| November | 6-8 |
| December | 5-7 |
Average Air Quality in Tucson, Arizona
Tucson, Arizona generally enjoys good air quality throughout the year.
On average, the Air Quality Index (AQI) in Tucson often falls within the “Good” category. This means that air pollution poses little or no risk to health for the general population.
The city sees occasional spikes in air pollution levels primarily due to dust, vehicle emissions, and wildfires.
These spikes are more frequent during certain weather conditions such as high winds or dry periods.
Key Air Quality Metrics
- AQI Levels: Typically between 0-50 (Good).
- Main Pollutants: PM2.5, Ozone.
- Annual Highs: Occasionally moderate (50-100 AQI) during wildfire season.
Important Considerations
Visibility can be impacted during periods of high particulate matter, particularly from dust storms.
It’s important to check the air quality forecast especially if you have respiratory conditions.
Topography of Tucson, Arizona
Tucson, Arizona is situated at a latitude of approximately 32.22° N and a longitude of about 110.97° W.
The city sits in the Sonoran Desert, known for its unique desert landscape. Saguaro cacti, rocky terrain, and dry riverbeds characterize the area.
Tucson’s average elevation is 2,450 feet (750 meters) above sea level. This elevation gives the city a slightly cooler climate compared to lower desert regions.
The Santa Catalina Mountains lie to the north, offering peaks that reach over 9,000 feet in altitude. Mount Lemmon, the highest peak, is a popular spot for hiking and skiing.
Other mountain ranges such as the Rincon Mountains to the east, the Santa Rita Mountains to the south, and the Tucson Mountains to the west surround the city, creating a scenic backdrop.
Arid and semi-arid conditions dominate Tucson’s environment. Limited rainfall and high temperatures are typical due to its desert location. The city receives an average of 12 inches of rain annually.
Soils in the Tucson area are mostly sandy and rocky, which affects vegetation and water absorption. Desert flora like mesquite trees, palo verde, and various types of cacti thrive in these conditions.
Tucson’s unique topography influences weather patterns and contributes to its distinctive climate. Elevation changes from the surrounding mountains to the lower city areas can cause noticeable temperature variations and seasonal weather changes.
Extreme Weather Events that Occur in Tucson, Arizona
Tucson, Arizona, experiences several types of extreme weather events throughout the year. These events can have significant impacts on the community and the environment.
Tucson is well-known for its monsoon season. From mid-June to late September, heavy rains, thunderstorms, and lightning are common.
These storms can cause flash flooding, making roads dangerous and affecting properties.
Hailstorms can also occur during the monsoon. Hailstones vary in size but can cause damage to vehicles, roofs, and crops. Hail is less frequent than rain but can be very destructive when it happens.
Another major concern is the extreme heat. In the summer months, temperatures often exceed 100°F. This intense heat poses risks to health, like heat exhaustion and heatstroke, especially for vulnerable populations.
Occasionally, Tucson experiences dust storms or “haboobs.” These storms, driven by strong winds, reduce visibility drastically and can lead to hazardous driving conditions. They also contribute to poor air quality.
Droughts are another critical issue. Periods of extended dry weather can strain water resources, affecting agriculture and water supply. Tucson’s semi-arid climate makes it susceptible to drought conditions, impacting daily life and economic activities.
Additionally, high winds can accompany thunderstorms. These winds can knock down trees, power lines, and cause structural damage to buildings.
Best Time of the Year to Visit Tucson, Arizona
Tucson offers different experiences throughout the year, making it a great destination in every season. From pleasant spring temperatures to winter’s sunny days, each season has its unique appeal.
What is Tucson, Arizona Like in Spring
Spring, from March to May, is a popular time to visit Tucson.
The weather is pleasant with daytime highs ranging from 70°F to 85°F. Nights are cooler, averaging around 50°F to 55°F.
This is an ideal time for outdoor activities such as hiking in Saguaro National Park and attending local festivals.
Wildflowers bloom, adding beautiful colors to the desert landscape.
Hotel rates are reasonable, and there are fewer crowds compared to peak winter months.
What is Tucson, Arizona Like in Summer
Summer in Tucson, from June to August, is very hot with temperatures often exceeding 100°F.
This season also sees the monsoon rains, mainly in July and August.
Despite the heat, this period is great for water activities like tubing on the Salt River or enjoying indoor attractions such as museums.
Visitors can find great deals on accommodations since it’s off-peak season.
Early morning and late evening are the best times to enjoy outdoor activities to avoid the intense midday heat.
What is Tucson, Arizona Like in Fall
Fall, from September to November, offers cooler temperatures, ranging from 75°F to 85°F during the day.
It’s a fantastic time for outdoor festivals, hiking, and visiting pumpkin patches.
September marks the end of the monsoon season, making it a more stable time for outdoor events.
The crowds are smaller, and the weather is perfect for exploring the scenic landscapes and attending local fall-themed activities.
What is Tucson, Arizona Like in Winter
Winter, from December to February, is another ideal time to visit Tucson.
Temperatures are mild, with daytime highs between 65°F and 70°F and cooler nights around 40°F to 45°F.
This season is popular among tourists seeking pleasant weather.
Activities such as hiking, golfing, and visiting outdoor markets are very enjoyable.
It’s also the peak tourist season, so expect higher accommodation rates and more crowds.