Last updated: February 6, 2025
In September, San Jose, Spain, boasts a delightful climate that captures the essence of early autumn. The maximum temperature reaches a pleasant 28°C (83°F), while the average temperature remains comfortable at 24°C (76°F). Enjoy warm days with evening lows averaging 18°C (66°F), perfect for outdoor activities. Rainfall is minimal, totaling just 26 mm (1.0 in) over two days, allowing for plenty of sunshine and clear skies. With humidity around 70%, the weather feels refreshing and inviting, making it an ideal time to explore the vibrant surroundings and breathe in the beauty of this charming locale.
September in San Jose, Spain, marks a transitional month where the summer warmth lingers pleasantly. With minimum temperatures around 18°C (66°F) and an average reaching 24°C (76°F), the days are inviting and conducive to outdoor activities. The maximum temperatures can climb to 28°C (83°F), making it one of the last opportunities to bask in the sun before the cooler autumn months set in. As the nights draw in, the temperature also hints at the changing season, but the overall warmth and moderate climate mean September remains a favorite time for visitors and locals alike, blending the tail end of summer with the gentle onset of fall.
In September, San Jose experiences a notable increase in precipitation after the dry summer months, with a total of 26 mm (1.0 in) spread over just 2 days of rain. This marks a significant rise compared to the preceding months, especially July and August, which recorded no precipitation. As the city transitions into fall, September's rainfall is a precursor to the wetter months ahead, as indicated by the upcoming October average of 29 mm (1.1 in). This shift sustains the local ecosystem, bringing much-needed moisture and paving the way for the lush autumn foliage.
In September, San Jose, Spain, experiences a mild humidity level of 70%, a slight rise from the summer months. This transitional period marks a deviation from the drier conditions seen in late spring, where humidity dipped to its lowest at 64% in May. Throughout the year, there’s a general trend of fluctuating humidity, with the highest peaks occurring in the colder months of October and December, both at 74%. Interestingly, after the dry heat of summer, the return of moisture in September heralds the approach of autumn, bringing a subtle shift in the climate that is both refreshing and invigorating.
In September, San Jose experiences a notable decline in UV intensity as summer transitions to autumn, with a UV Index of 8, classified as very high. This slight dip from the peak of June and July (both at a scorching 11) indicates that while the sun’s rays are still potent, outdoor enthusiasts should take a bit more care, allowing for a burn time of just 15 minutes for those with lighter skin. Comparatively, early autumn brings a refreshing relief from the extreme summer conditions, yet maintaining sun safety remains crucial. As the month closes, keep an eye on the changing trends, and for more details on UV levels throughout the year, visit San Jose UV Index.
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In September, San Jose basks in a delightful 341 hours of sunshine, marking a gentle decline from the peak summer months of July and June when the sun shone brightest. This vibrant month transitions gracefully from the hotter days of August, which recorded 388 hours of bright skies, offering a perfect balance for outdoor enthusiasts. The trend reveals a gradual descent in sunshine as autumn approaches, yet September retains a warm glow, making it an ideal time for leisurely strolls and cultural festivities. As the city prepares to embrace the changing seasons, the sun continues to cast its golden rays, creating a picturesque backdrop for all who visit.
In September, San Jose, Spain enjoys a 65% chance of sunny weather, making it a delightful time to soak in the late-summer sun. As the month transitions from the sweltering July, which peaks at an impressive 88%, and the still-sunny August at 76%, September's weather remains inviting before the cooler months set in. This trend suggests that while the intensity of summer gradually wanes, the likelihood of clear skies remains robust, offering plenty of opportunities for outdoor activities. With a marked decrease from the summer highs yet a noticeable advantage over the autumn months like October, which dips to 49%, September stands out as a sweet spot for sunshine lovers.
As summer transitions to autumn in San Jose, Spain, September experiences a gradual reduction in daylight, with the sun gracing the sky for 12 hours each day. This marks a gentle decline from the peak summer months of June through August, where daylight stretches up to 14 hours. The month acts as a bridge, easing the community into the shorter days of fall, yet still offering ample sunlight for outdoor activities. Following September, daylight continues to dwindle, leading into October's 11 hours and November's 10 hours. This subtle shift highlights the changing seasons and invites locals to savor the warm hues of early autumn while the days remain relatively long.
As summer gently gives way to autumn, September in San Jose, Spain, embraces a shift in wind dynamics. With an average wind speed of 5.1 m/s (11 mph), September's breezes are slightly calmer than the preceding summer months, reflecting a gradual transition from the warmer, breezier days of July and August. This slight decrease in wind speed marks a trend of diminishing gusts as the year approaches its end, with wind speeds stabilizing again in October at 5.5 m/s (12 mph). Despite this mild respite, the winds maintain a refreshing quality, inviting residents and visitors to enjoy the crisp air and the vibrant hues of early autumn. Overall, the trends in wind speed throughout the year highlight a rhythmic ebb and flow, blending the warmth of summer with the promise of cooler fall days.
The weather in San Jose 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 San Jose and find detailed weather information for every month.
September and January present contrasting weather patterns in San Jose. In September, temperatures range from a mild 18°C (66°F) at night to a warm 28°C (83°F) during the day, with an average temperature of 24°C (76°F). The month experiences low precipitation, with only 26 mm (1.0 in) over just 2 days, and humidity levels hover around 70%. In contrast, January brings cooler temperatures, with a minimum of 7°C (45°F), an average of 13°C (56°F), and a maximum of 18°C (65°F). The month sees slightly more precipitation at 31 mm (1.2 in) over 4 days, and humidity is marginally higher at 72%. For more details on January weather, you can visit San Jose weather in January.
In September, the weather is generally warmer, with temperatures ranging from a minimum of 18°C (66°F) to a maximum of 28°C (83°F) and an average of 24°C (76°F). The month sees about 26 mm (1.0 in) of precipitation over just 2 days, making it relatively dry while maintaining a humidity level of around 70%. In contrast, February offers cooler temperatures, with a minimum of 9°C (49°F) and a maximum of 18°C (65°F), along with an average temperature of 14°C (58°F). The precipitation in February is lighter at 12 mm (0.5 in) but occurs over more days (3 days), and humidity remains similar at 71%. For more detailed insights on February's climate, check out San Jose weather in February.
In September, the weather is pleasantly warm, with temperatures ranging from a minimum of 18°C (66°F) to a maximum of 28°C (83°F), and an average of 24°C (76°F). It experiences relatively low precipitation, with only about 26 mm (1.0 in) over just 2 days, while humidity hovers around 70%. In contrast, March brings cooler temperatures, with a minimum of 10°C (50°F) and a maximum of 20°C (68°F), averaging at just 15°C (59°F). This month sees slightly higher precipitation at 32 mm (1.2 in) spread over 5 days, with humidity remaining similar at 69%. For more detailed information, you can check San Jose weather in March.
September weather tends to be warmer compared to April, with average temperatures reaching 24°C (76°F) and maxing out at 28°C (83°F), whereas April sees lower averages around 16°C (61°F) with a maximum of 21°C (70°F). Additionally, September experiences less precipitation, averaging only 26 mm (1.0 in) over just 2 days, while April receives more rainfall, totaling 39 mm (1.5 in) over 6 days. Humidity is slightly higher in September at 70%, compared to 66% in April. For a more detailed look at April's climate, you can check out San Jose weather in April.
In comparing the weather of September and May, September generally enjoys warmer temperatures with a minimum of 18°C (66°F) and an average of 24°C (76°F), peaking at 28°C (83°F). In contrast, May starts cooler with a minimum of 14°C (57°F) and an average of 19°C (67°F), reaching a maximum of 25°C (76°F). Precipitation is more frequent in September, totaling 26 mm (1.0 in) over 2 days, while May sees less rain at just 11 mm (0.4 in) across a single day. Additionally, the humidity in September is higher at 70%, compared to May's 64%. For those interested in more details about May's weather, you can check San Jose weather in May.
When comparing the weather in September and June, both months showcase similar warm temperatures, with September having slightly higher average temperatures. September features minimum temperatures of 18°C (66°F), an average of 24°C (76°F), and maximums reaching 28°C (83°F), coupled with moderate humidity at 70%. In contrast, June presents a minimum temperature of 18°C (65°F), an average of 22°C (72°F), and matches the maximum of 28°C (83°F), but with lower humidity levels at 65% and significantly less rainfall, totaling only 6 mm (0.2 in). For more detailed insights into the climate during June, you can check San Jose weather in June.
In comparing the weather of September and July, September generally experiences slightly cooler temperatures with minimums of 18°C (66°F) compared to July's 21°C (69°F). The average temperature in September is 24°C (76°F), while July averages 25°C (77°F). Additionally, September tends to be a bit wetter, with 26 mm (1.0 in) of precipitation over two days, in stark contrast to July's dry conditions with no recorded precipitation. Humidity levels remain consistent in both months, around 70-71%. For a closer look at July weather specifics, you can refer to this link: San Jose weather in July.
In comparing the weather between August and September, September experiences slightly cooler temperatures, with a minimum of 18°C (66°F) and a maximum of 28°C (83°F), contrasted with August's warmer range of 20°C (69°F) to 31°C (88°F). The average temperature also decreases from 26°C (79°F) in August to 24°C (76°F) in September. Additionally, September sees more precipitation, with 26 mm (1.0 in) over 2 days, whereas August remains dry with only 10 mm (0.4 in) and no rainy days. The humidity remains relatively constant, at 70% in September compared to 69% in August. For further details on August weather, check out San Jose weather in August.
In September, the weather is typically warmer with average temperatures reaching 24°C (76°F) and maximums of 28°C (83°F), accompanied by relatively low precipitation of 26 mm (1.0 in) over just 2 days. The humidity stands at 70%, providing a warm and somewhat comfortable atmosphere. In contrast, October brings cooler temperatures, with an average of 21°C (70°F) and maximums of 26°C (79°F). Precipitation slightly increases to 29 mm (1.1 in) over 3 days, and humidity rises to 74%, making the air feel a bit more humid. For more details, you can check San Jose weather in October.
In September, the weather is generally warmer with temperatures ranging from a minimum of 18°C (66°F) to a maximum of 28°C (83°F), creating an average of 24°C (76°F). The month experiences moderate rainfall, with about 26 mm (1.0 in) over just 2 days and a humidity level around 70%. In contrast, November brings cooler conditions, with temperatures dropping to a minimum of 12°C (54°F) and peaking at 23°C (73°F), resulting in an average of 17°C (63°F). Additionally, November sees slightly increased precipitation of 31 mm (1.2 in) over 5 days, alongside a marginal rise in humidity to 72%. For a more detailed look at the climate, you can check San Jose weather in November.
September and December exhibit notable differences in weather patterns. September boasts warmer temperatures, with a minimum of 18°C (66°F) and an average of 24°C (76°F), peaking at a maximum of 28°C (83°F). In contrast, December sees cooler temperatures, ranging from a minimum of 10°C (50°F) to an average of 15°C (59°F), and a maximum of 19°C (67°F). Both months receive similar amounts of precipitation, with September at 26 mm (1.0 in) and December at 24 mm (0.9 in), with rainfall occurring on two days in each month. Humidity levels are also slightly higher in December at 74%, compared to 70% in September. For a more detailed look at December weather, you can check this link: San Jose weather in December.
As September unfolds in San Jose, the weather reveals a delightful transition towards autumn. With maximum temperatures reaching a comfortable 28°C (83°F), this month provides a pleasantly warm atmosphere, ideal for outdoor activities. The average temperature stabilizes around 24°C (76°F), and while the minimum dips to about 18°C (66°F), nights remain comfortably mild. Precipitation is rare, with only a couple of rainy days that contribute to a modest total of 26 mm (1.0 in) for the month. Humidity levels around 70% lend a slight stickiness to the air, but overall, September stands out as a perfect blend of warmth and refreshing breezes. For those curious about the yearly climate variations, visit San Jose Climate for more insights.