Last updated: February 24, 2025
April in Palo Alto, United States, presents a mild and inviting climate ideal for outdoor activities. With maximum temperatures reaching 30°C (87°F), the days are pleasantly warm, while the average temperature hovers around 13°C (57°F), providing a comfortable balance. The nights can be cool, dipping to a minimum of 6°C (42°F). April also brings some rainfall, with a total precipitation of 33 mm (1.3 in) spread over 5 days, contributing to a humidity level of 78%. This blend of warm days, cool nights, and occasional showers creates a refreshing ambiance, making it a delightful month in this vibrant city.
In April, Palo Alto transitions into its warmest spring month, showcasing a delightful rise in temperatures. With minimums of 6°C (42°F) and a maximum reaching up to 30°C (87°F), the average temperature settles comfortably at 13°C (57°F), inviting outdoor activities and blooming gardens. This month marks a clear shift from the cooler early months of the year, where temperatures hovered around 11°C (52°F) on average in January and February and gradually increased to 12°C (54°F) in March. The warm sun drenches the landscape, offering a taste of the vibrant summer ahead, as locals and visitors alike are encouraged to bask in the pleasant weather and enjoy all that this charming city has to offer.
April in Palo Alto marks a distinct transition into the dry season, characterized by significantly reduced precipitation compared to the preceding months. With only 33 mm (1.3 in) of rainfall over 5 days, April stands out as one of the driest months in the year, following the wetter spring months of January through March. This steep decline from March's 86 mm (3.4 in) highlights the region’s shift towards its typical Mediterranean climate, where the landscape prepares for golden, sun-soaked days ahead. As Palo Alto moves into May and June, further decreases in rainfall can be anticipated, with averages dropping to as low as 2 mm (0.1 in) by June, indicating a clear trend toward drier conditions and longer stretches of sunshine.
In April, Palo Alto experiences a noticeable decline in humidity, dipping to 78% from the higher levels observed in the preceding months. This reduction marks the start of a trend towards drier conditions, as the humidity continues to decrease leading into May, when it drops further to 71%. Notably, April’s figures align closely with those of January, March, and November, all characterized by a more humid atmosphere. However, as spring unfolds, residents can anticipate increasingly comfortable and pleasant weather, as the humidity gradually settles into the more arid summer months, exemplified by the 58% recorded in July.
As April unfolds in Palo Alto, the UV Index spikes to an impressive 9, classifying it within the very high exposure category. This marks a notable rise from the earlier months, especially compared to the moderate levels seen in January and February. The trend indicates an increasing intensity of UV radiation as spring progresses, with the burn time dropping to just 15 minutes. As the days grow longer and sunnier, residents and visitors are encouraged to take precautions to protect their skin during this peak exposure period. The upcoming month of May promises even higher UV intensity, reaching an Index of 10. For more details on UV levels throughout the year, visit Palo Alto UV Index.
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As April unfolds in Palo Alto, residents bask in 296 hours of sunshine, marking a delightful transition into spring. This significant increase from 263 hours in March showcases a steady upward trend in daylight hours, a precursor to the even sunnier months ahead. With 341 hours in May and peaking at 355 hours in June, the warmth of longer days invites outdoor activities and vibrant community events. The consistent rise in sunshine not only brightens the days but also energizes the spirit, emphasizing the area's charm as the sun shines brighter and stays longer, encouraging everyone to savor the beauty of the season.
As April unfolds in Palo Alto, the likelihood of sunny weather sits at 45%, slightly lower than the preceding months of March and February, which boast higher chances of sunshine at 57% and 55%, respectively. This dip marks a transitional moment as the region shifts from the briskness of winter towards the warmer embrace of spring. While April’s sunshine chances ebb, they pave the way for May's ascent, which peaks at an encouraging 62%. This trend highlights a gradual increase in sunny days as residents anticipate the bright, sunlit moments that characterize the approach of summer. Thus, while April may not be the sunniest month, it's a promising lead into brighter days ahead.
As spring unfolds in Palo Alto, April marks a delightful transition with an increase in daylight that reaches a generous 13 hours. Following the gradual rise from 11 hours in March, this surge hints at the approach of summer and the longer days that come with it. The trend of increasing daylight hours continues as we move into May and June, where daylight stretches to a peak of 14 hours. This pattern showcases the area's vibrant seasonal shifts, offering residents and visitors alike more opportunities to enjoy outdoor activities under the warming sun. The eventual reduction in daylight as summer transitions into fall reminds us of the cyclical nature of the seasons, creating a rhythm that marks the passage of time in this beautiful region.
As April arrives in Palo Alto, the winds remain gentle, maintaining an average speed of 2.6 m/s (6 mph)—a steady continuation from March. This slight yet consistent breeze hints at the transition into spring, where wind speeds gradually begin to rise over the months, peaking in May at 3.0 m/s (7 mph). Following this, the winds settle back down in June, suggesting a comforting calm that characterizes the region's summer months. Overall, the spring breeze serves as a refreshing prelude to the warmer days ahead, while establishing a trend of gradual variation that defines Palo Alto's climate throughout the year.
The weather in Palo Alto changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of April's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Palo Alto and find detailed weather information for every month.
April generally offers milder temperatures compared to January, with average highs reaching up to 30°C (87°F) and lows around 6°C (42°F), while January sees maximums of 24°C (75°F) and minimums of 2°C (36°F). Precipitation is lower in April at 33 mm (1.3 in) over about 5 days, compared to January’s 105 mm (4.1 in) spread across 7 days. Although April is slightly more humid at 78%, January maintains a higher humidity level at 82%, contributing to its cooler, wetter conditions. For more details on January weather, check out Palo Alto weather in January.
When comparing the weather in April and February, April generally enjoys milder temperatures with a minimum of 6°C (42°F) and an average of 13°C (57°F), peaking at a warmer 30°C (87°F). In contrast, February starts cooler with a minimum of 2°C (37°F) and an average of 11°C (53°F), reaching a maximum of 24°C (76°F). Precipitation levels also differ significantly, with April receiving only 33 mm (1.3 in) over about 5 days, while February experiences a wetter climate with 100 mm (3.9 in) over 8 days. Additionally, February has a slightly higher humidity level at 84% compared to April's 78%. For more details about February weather, you can check out Palo Alto weather in February.
When comparing the weather in March and April, April tends to be noticeably warmer and drier. While March has an average temperature of 12°C (54°F) with a max of 25°C (78°F), April sees an increase with an average of 13°C (57°F) and a maximum reaching 30°C (87°F). Additionally, precipitation decreases significantly from March's 86 mm (3.4 in) over 11 days to just 33 mm (1.3 in) across 5 days in April, reflecting a shift toward sunnier conditions. Humidity is also slightly lower in April at 78%, compared to March’s 82%. For more details, you can check out Palo Alto weather in March.
April and May exhibit notable differences in weather patterns. In April, temperatures range from a minimum of 6°C (42°F) to a maximum of 30°C (87°F), with an average of 13°C (57°F). The month sees higher precipitation levels, totaling 33 mm (1.3 in) over five days, along with a humidity level of 78%. In contrast, May presents slightly warmer conditions, with minimum temperatures of 8°C (46°F) and a maximum of 29°C (84°F), averaging 15°C (59°F). Precipitation decreases to 24 mm (0.9 in) occurring over just two days, and humidity drops to 71%. These changes make May a drier and warmer month compared to April. For more specific details, you can check Palo Alto weather in May.
April and June present quite different weather patterns. In April, temperatures range from a minimum of 6°C (42°F) to a maximum of 30°C (87°F), with an average temperature of 13°C (57°F). The month sees a fair amount of precipitation, totaling 33 mm (1.3 in) over about 5 days, and humidity levels at 78%. In contrast, June offers warmer temperatures, with a minimum of 10°C (49°F) and a maximum of 35°C (96°F), averaging 17°C (63°F). Rainfall is scarce, totaling just 2 mm (0.1 in) and occurring over 0 days, while humidity drops to a more comfortable 64%. For a detailed overview of June weather, visit Palo Alto weather in June.
In April, the weather is quite variable, with temperatures ranging from a chilly 6°C (42°F) at night to a warm 30°C (87°F) during the day, and an average of 13°C (57°F). The month also sees moderate rainfall of about 33 mm (1.3 in) spread over five days, accompanied by high humidity at 78%. In contrast, July offers a more stable climate, with a milder temperature range from a minimum of 11°C (53°F) to a maximum of 29°C (84°F) and an average of 17°C (63°F). Notably, July is dry, with no recorded precipitation and only 58% humidity, contributing to a more comfortable and pleasant atmosphere. For a closer look at July's weather specifics, check out Palo Alto weather in July.
April and August present distinct weather patterns. In April, temperatures range from a chilly minimum of 6°C (42°F) to a pleasant maximum of 30°C (87°F), with an average of 13°C (57°F). This month sees about 33 mm (1.3 in) of precipitation over five days, accompanied by a relatively high humidity level of 78%. In contrast, August enjoys warmer conditions, with minimum temperatures starting at 12°C (54°F) and peaking at a scorching 35°C (96°F), averaging 18°C (65°F). Notably, August is dry, experiencing no rainfall and significantly lower humidity at 54%. For more information, you can check Palo Alto weather in August.
April and September display notable differences in weather patterns. In April, temperatures range from a minimum of 6°C (42°F) to a maximum of 30°C (87°F), with an average of 13°C (57°F) and relatively high humidity at 78%. Precipitation is also more frequent, with about 33 mm (1.3 in) falling over five days. In contrast, September showcases warmer conditions with minimum temperatures at 10°C (50°F) and maximums soaring up to 39°C (103°F), averaging 18°C (66°F). This month typically enjoys dry weather, with only 2 mm (0.1 in) of precipitation over no rainy days and lower humidity at 55%. For more detailed information, check out Palo Alto weather in September.
April and October present distinct weather patterns as spring transitions into autumn. In April, temperatures typically range from a minimum of 6°C (42°F) to a maximum of 30°C (87°F), with an average of 13°C (57°F). The month experiences about 33 mm (1.3 in) of precipitation over five days, accompanied by relatively high humidity at 78%. In contrast, October features slightly warmer temperatures, with a minimum of 7°C (45°F) and a maximum of 33°C (92°F), averaging around 17°C (63°F). This month sees significantly less rainfall, with just 24 mm (0.9 in) falling over a single day, and lower humidity levels at 62%. For a more detailed look at the weather in October, you can check out Palo Alto weather in October.
April and November share similar average temperatures, hovering around 13°C (57°F), but their weather patterns differ notably. In April, temperatures can reach a maximum of 30°C (87°F), giving the month a more summery feel, while November experiences a cooler maximum of 27°C (80°F). Precipitation in November is higher at 47 mm (1.9 in), compared to April's 33 mm (1.3 in), suggesting that November is the wetter of the two months, despite both seeing rain on about five days. Interestingly, both months maintain a consistent humidity level of 78%, contributing to a generally comfortable atmosphere. For more on the November weather specifics, check out Palo Alto weather in November.
April and December offer distinct weather experiences. In April, temperatures range from a minimum of 6°C (42°F) to a maximum of 30°C (87°F) with an average of 13°C (57°F), creating a pleasantly warm atmosphere. The month sees about 33 mm (1.3 in) of precipitation over approximately 5 days, accompanied by a humidity level of 78%. In contrast, December is cooler, with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 22°C (72°F) and an average of 11°C (52°F). This month tends to be wetter, with 88 mm (3.5 in) of rain spread over 9 days and a slightly higher humidity of 80%. For more details, check out Palo Alto weather in December.
As April unfolds in Palo Alto, the city experiences a delightful transition in its weather, standing out from the cooler, wetter months that precede it. While temperatures begin to rise, boasting a maximum of 30°C, the crisp breeze of spring still lingers, creating a comfortable average of 13°C. April also brings a modest amount of rainfall, with 5 days of precipitation contributing to a total of just 33 mm, marking a significant decrease compared to the winter months. The air is often filled with a refreshing 78% humidity, lending a vibrant feel to the blooming surroundings. For a deeper dive into what to expect throughout the year, explore the Palo Alto Climate page.