Last updated: February 24, 2025
In September, Mesa, United States experiences a striking range of temperatures, with maximums soaring up to 44°C (112°F) and an average temperature of 31°C (88°F), creating a warm and inviting atmosphere. Nighttime brings a refreshing contrast, with temperatures dipping to a comfortable 12°C (54°F). Despite this heat, the month tracks a modest precipitation of 28 mm (1.1 in) over an average of just 3 rainy days, while humidity levels hover around 64%, adding a slight stickiness to the otherwise dry heat. Whether you're a local or a visitor, September in Mesa offers a quintessential desert experience.
September in Mesa, United States, marks a transition as the sweltering summer begins to ease, yet temperatures remain notably high. With a minimum of 12°C (54°F) and a maximum peaking at 44°C (112°F), the month showcases an average of 31°C (88°F), making it one of the warmer months of the year. This contrast highlights a drop from the intense heat of July and August, but still invites plenty of outdoor activities under the bright Arizona sun. As the days shorten and cooler evenings set in, September serves as a reminder of the impending autumn, blending remnants of summer warmth with the promise of milder days ahead.
In Mesa, United States, September experiences a moderate precipitation level, averaging 28 mm (1.1 in) across approximately 3 days of rainfall. This marks a slight decrease from the wetter months of July and August, which see 38 mm and 33 mm respectively. The transition into fall brings a gradual reduction in rainfall, as seen in previous months like April, May, and June, which recorded minimal precipitation. This pattern highlights the region's arid climate, where most rain is concentrated in the summer months, creating a stark dry spell before the autumn season begins. As September concludes, the overall trend suggests a continuing decline in precipitation, setting the stage for drier months ahead.
As September unfolds in Mesa, the humidity begins to fluctuate, marking a transition from the dry summer months to a more comfortable atmosphere. With an average humidity of 64%, September reflects a noticeable increase compared to the preceding months where it dipped to an arid 33% in June and a mere 34% in July. This rise signifies a shift toward more moisture as the region prepares for fall, bringing a refreshing contrast to the typically parched conditions of summer. Interestingly, while the humidity begins to climb again, it remains lower than the winter months, where levels soar above 76%. Overall, September offers a pleasant balance, blending the lingering warmth of summer with the promise of autumn's arrival.
In September, the UV Index in Mesa, United States, reaches a notable level of 10, categorizing it as very high and signaling a significant need for sun protection. Following the intense summer months characterized by extreme UV levels, this slight dip from August's consistent 11s still indicates a 15-minute burn time for unprotected skin. As the season transitions into autumn, it’s essential to remain vigilant about sun safety, especially with September's UV exposure closely mirroring the high levels observed in April and May. Those enjoying outdoor activities this month should be mindful of UV radiation and consider protective measures to safeguard their skin. For more detailed insights, check out Mesa UV Index.
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As September rolls into Mesa, the sun continues to shine brightly, offering a delightful 316 hours of sunshine. This marks a gentle decline from the peak summer months, where July and June basked in an impressive 359 and 374 hours, respectively. The transition from the vibrant summer to the cozy autumn brings a shift in daylight hours, yet September’s sunshine remains substantial, hinting at the lingering warmth of summer. With this abundance of sunlight, outdoor enthusiasts can still relish in the beauty of their surroundings, making September a charming month filled with golden rays before the days start to shorten further into fall.
In Mesa, the likelihood of sunny weather in September holds an appealing 69% chance, making it a month fairly rich in sunshine. This follows a notable upward trend from the lower percentages seen during the peak summer months of June (71%) and July (36%). September’s sunniness stands in contrast to August, which drops to 58%, indicating an attractive transition into fall. With the sun making a steady return as temperatures begin to cool, residents and visitors alike can look forward to enjoying delightful days filled with warmth and light before autumn takes full effect. Overall, September offers a pleasant balance, making outdoor activities more enjoyable.
As September arrives in Mesa, the daylight duration begins its gentle descent, offering about 12 hours of daylight. This marks a subtle shift from the vibrant summer months of June and July, when the sun graced the skies for a luxurious 14 hours each day. The trends in daylight duration reflect the gradual transition into fall, with September still basking in more sunlight than the early months of the year, like January and February, which provide only 10 hours. However, as the month progresses, the days will continue to shorten, leading into October's 11 hours. This rhythmic ebb and flow of daylight not only illuminates the landscape but also sets the stage for the cozy, cooler days ahead.
As September rolls into Mesa, the winds soften to an average speed of 1.9 m/s (4 mph), mirroring the calm breezes of August. This slight dip signals the end of the summer heat, with wind speeds gradually decreasing from a peak of 2.7 m/s in the spring and early summer months. The transition into fall brings a tranquil atmosphere, reminiscent of earlier months like July, where winds hovered around 2.1 m/s. As the year progresses into October and November, we can anticipate a modest uptick in wind speeds, suggesting an invigorating shift as autumn fully settles in. Overall, this gentle decline in September's wind speed marks a serene shift in Mesa's climatic rhythm, perfectly suited for outdoor exploration or relaxation against the backdrop of changing seasons.
The weather in Mesa changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Mesa and find detailed weather information for every month.
Comparing the weather in September and January reveals significant differences in temperature and humidity levels. In September, temperatures soar with a minimum of 12°C (54°F) and an average high reaching a scorching 44°C (112°F), while humidity hovers around 64%. In stark contrast, January experiences much cooler conditions, featuring a minimum of -2°C (29°F) and an average high of 28°C (82°F), accompanied by higher humidity at 76%. Additionally, September sees less precipitation at 28 mm (1.1 in) over three days, compared to January's 33 mm (1.3 in) over four days. For more details, check out Mesa weather in January.
September experiences significantly warmer temperatures, with minimums around 12°C and maximums reaching up to 44°C, creating a hot and dry atmosphere. In contrast, February is much cooler, with temperatures ranging from a chilly 0°C at night to an average high of 28°C during the day. Additionally, February sees more precipitation, with 44 mm falling over approximately four days, while September has only 28 mm over three days. The humidity is also higher in February at 79%, compared to 64% in September. For more insights on February weather, you can check out Mesa weather in February.
September and March exhibit contrasting weather patterns, reflecting the transition from summer to spring. September boasts warmer temperatures, with an average of 31°C (88°F) and a maximum reaching up to 44°C (112°F), while March is notably cooler, averaging 17°C (63°F) and peaking at 34°C (94°F). Despite both months experiencing similar rainfall, with precipitation around 28 mm (1.1 in) in September and 31 mm (1.2 in) in March over three days, humidity levels are slightly higher in March at 67% compared to September's 64%. For more details, you can explore the specific conditions in March by visiting Mesa weather in March.
In comparing the weather of September and April, September tends to be much hotter, with average temperatures soaring to 31°C (88°F) and maximum temperatures reaching a sweltering 44°C (112°F). In contrast, April offers a milder experience, featuring an average temperature of 23°C (74°F) and maximums of 39°C (102°F). Additionally, September experiences more precipitation, with 28 mm (1.1 in) over three days, whereas April typically sees very little rain, averaging only 2 mm (0.1 in) and no rainy days at all. Humidity levels are also higher in September at 64%, compared to 55% in April. For a closer look at conditions during this spring month, check out Mesa weather in April.
September and May exhibit distinct weather patterns that highlight the transition between summer and fall in the region. In September, temperatures can range from a minimum of 12°C (54°F) to a scorching maximum of 44°C (112°F), with an average temperature of 31°C (88°F). The month also experiences more humidity at 64% and some rainfall, totaling 28 mm (1.1 in) over three days. In contrast, May presents milder conditions, with temperatures varying from a low of 12°C (54°F) to a maximum of 42°C (108°F) and an average of 27°C (81°F). Notably, May enjoys very little precipitation, recording just 2 mm (0.1 in) across zero rainy days and a lower humidity level of 40%. For more insights into the weather conditions during this month, visit Mesa weather in May.
In September, the weather tends to be quite warm with average temperatures hovering around 31°C (88°F) and reaching highs of 44°C (112°F), while the minimum temperature is cooler at 12°C (54°F). This month also experiences a bit of rainfall, averaging 28 mm (1.1 in) over about 3 days, with humidity levels around 64%. In contrast, June offers slightly higher average temperatures at 33°C (92°F) and can peak at a scorching 47°C (117°F), while the minimum temperature starts at a mild 17°C (64°F). Remarkably, June sees very little precipitation, with only 2 mm (0.1 in) and no rainy days, and a significantly lower humidity level of 33%. For a closer look at June weather specifics, you can explore Mesa weather in June.
In comparing the weather between September and July, we see significant differences in both temperature and humidity. September experiences a milder range with minimum temperatures around 12°C (54°F), an average of 31°C (88°F), and maximums reaching 44°C (112°F). In contrast, July tends to be hotter, featuring minimum temperatures of 23°C (73°F), an average of 34°C (94°F), and peak temperatures of 47°C (116°F). Additionally, September has higher humidity levels at 64% compared to July's 34%, though July has more precipitation, averaging 38 mm (1.5 in) over 6 days versus September's 28 mm (1.1 in) over 3 days. For a more detailed look at July weather, you can check this link: Mesa weather in July.
In comparing the weather between September and August, September presents a noticeable drop in minimum temperatures, with lows averaging 12°C (54°F), while August starts at a warmer 22°C (71°F). The average high temperature in September is slightly cooler at 31°C (88°F) compared to August’s higher average of 34°C (93°F). In terms of maximum temperatures, September peaks at 44°C (112°F), which is marginally lower than August’s maximum of 46°C (115°F). While precipitation in September is slightly lower at 28 mm (1.1 in) over three days, August experiences 33 mm (1.3 in) across four days, also showcasing a significant difference in humidity levels—September's humidity is higher at 64%, whereas August enjoys a drier 48%. For more detailed insights, you can check Mesa weather in August.
In September, the weather exhibits a wide temperature range, with lows around 12°C (54°F) and highs reaching up to 44°C (112°F), resulting in an average temperature of 31°C (88°F). The month experiences 28 mm (1.1 in) of precipitation over 3 days, with humidity levels sitting at 64%. In contrast, October brings cooler temperatures, with a minimum of 6°C (43°F) and a maximum of 40°C (104°F), leading to a more comfortable average of 24°C (75°F). Precipitation slightly decreases to 25 mm (1.0 in) over just 2 days, and humidity rises to 67%. For more detailed information, you can check Mesa weather in October.
September and November present a striking contrast in weather conditions. In September, temperatures range from a minimum of 12°C (54°F) to a sweltering maximum of 44°C (112°F), with an average of 31°C (88°F). The month experiences about 28 mm (1.1 in) of precipitation over three days, accompanied by 64% humidity. In comparison, November offers a much cooler climate, with temperatures dipping to a minimum of 5°C (41°F) and peaking at 36°C (96°F), averaging 18°C (65°F). Precipitation drops slightly to 23 mm (0.9 in) over just one day, while humidity increases to 77%. For more insights on November weather, check out Mesa weather in November.
In September, the weather is characterized by high temperatures, with average highs reaching 31°C (88°F) and peaks that can soar to 44°C (112°F). This month experiences relatively low precipitation, totaling 28 mm (1.1 in) over about three days, accompanied by a moderate humidity level of 64%. In contrast, December brings a much cooler climate, with average temperatures sitting around 12°C (54°F) and maximums reaching 28°C (82°F). The month sees slightly lower precipitation at 27 mm (1.0 in) across four days and higher humidity levels at 82%. For those interested in understanding more about December's weather patterns, you can find detailed information here: Mesa weather in December.
As September arrives in Mesa, the weather begins to shift, offering a welcoming break from the intense summer heat. While temperatures can still soar to max highs of 44°C, the average tends to settle around a more comfortable 31°C. This month also sees a decrease in both precipitation and humidity, with only a few rainy days punctuating the otherwise dry atmosphere. The contrast with the sizzling summer months is noticeable, making September a more pleasant time to enjoy outdoor activities and the stunning Arizona landscape. For a more detailed look at how Mesa's weather unfolds throughout the year, check out the full Mesa Climate guide.