Located in the heart of California’s Central Valley, Modesto enjoys a Mediterranean climate with hot summers and cool winters.
The hottest month of the year in Modesto is July, with average high temperatures reaching 95°F and lows dipping to 64°F.
This makes Modesto an ideal spot for those who enjoy warm weather and sunshine.
During the cool season, which lasts from November through mid-February, temperatures are more moderate.
Highs typically stay below 62°F, providing a pleasant break from the summer heat.
Modesto experiences over 200 days of sunshine each year, making it a great place for outdoor activities and events.
Rainfall in Modesto is minimal during the summer months. For example, July and August see only about 0.04 inches of rain on average.
For detailed climate data and monthly temperatures, you can explore the climate graph of Modesto.
Whether it’s summer or winter, the diverse weather conditions add to the charm of this vibrant city.
Average Temperature In Modesto, California
The average temperature in Modesto varies significantly throughout the year.
The hottest month is July, with average high temperatures reaching up to 95°F and average lows around 64°F.
This period of high temperatures stretches from June to September, commonly known as the hot season, which lasts approximately 3.6 months.
During this hot season, daily high temperatures stay above 87°F. Additionally, the hottest days might even see temperatures climbing up to 108°F.
This period is characterized by sunny and dry days with minimal rainfall.
The cool season in Modesto runs from November to February, lasting about 2.8 months.
During this time, average daily highs drop to about 57°F.
The coldest month is typically January, where daytime highs are around 55°F and nighttime lows can hover near 37°F.
Throughout the year, the average temperatures in Modesto exhibit a pattern of warm, hot summer days and mild, cooler winters.
Evening temperatures during the summer can still maintain some warmth, staying typically around the mid-60s°F.
Conversely, winter nights can get quite cool, often reaching the lows in the high 30s°F to low 40s°F.
Temperature variation between summer and winter highlights how Modesto transitions from hot to mild climates.
These changes offer a diverse weather experience for residents and visitors alike, balancing between seasons with defined warm and cool periods.
Average Precipitation In Modesto, California
Modesto experiences a variety of precipitation patterns throughout the year, with most of the rain falling in the winter months and very little during summer. The area typically does not receive any snowfall, making rain the primary form of precipitation.
Average Rainfall In Modesto, California
Modesto has a Mediterranean climate, characterized by wet winters and dry summers.
The wettest month is January, with an average of around 2.8 inches of rain.
By contrast, the months of July and August receive the least rainfall, often seeing less than 0.1 inch combined during these months.
Throughout the year, Modesto averages about 14 inches of total precipitation.
The number of rainy days in a year is around 50, with most occurring between November and March.
Rainfall contributes significantly to the region’s agriculture, replenishing soil moisture and supporting the growth of crops.
Average Snow In Modesto, California
Snowfall is virtually non-existent in Modesto. The city’s mild winters ensure that temperatures remain above freezing, even during the coldest months.
While other regions in the state may experience snow and ice, Modesto remains dry in this regard.
The absence of significant snowfall means that residents do not have to deal with snow-related challenges.
The lack of snow also means no disruptions from icy roads and school closures, which can be common in other parts of the country.
This makes Modesto’s weather relatively mild and manageable year-round.
Average Sun In Modesto, California
Modesto enjoys plenty of sunshine throughout the year. The most sunshine occurs in summer, while winter months have shorter days but still offer many sunny periods.
Average Daily Shortwave Solar Energy In Modesto, California
Modesto receives significant solar energy, with daily averages varying throughout the year.
The shortest day of the year, usually around December 21, sees only about 9 hours of daylight.
In contrast, the longest day around June 21 offers nearly 15 hours of daylight.
Sunshine hours peak in July with an average of about 13 hours per day.
During winter, January sees around 6.76 hours of sunshine.
The area experiences partly cloudy days mostly in winter, but generally has many sunny days annually, accumulating nearly 3,629 sunshine hours each year.
Average Humidity In Modesto, California
Modesto experiences varying levels of humidity throughout the year. The climate is generally classified as hot and dry in the summer months, and cooler with higher humidity in the winter months.
Monthly Humidity Levels
- January: Average relative humidity is around 82%.
- April: Average relative humidity drops to about 63%.
- July: Average relative humidity is the lowest at about 47%.
- October: Average relative humidity rises again to around 62%.
Dew Point
The dew point, which indicates the amount of moisture in the air, varies across seasons.
In summer, the dew point typically ranges from 55°F to 60°F, indicating dry conditions.
During winter, it usually measures around 40°F, suggesting a higher moisture level in the air.
Daily Variations
- Morning: Humidity is generally higher in the mornings, often exceeding 80% during cooler months.
- Afternoon: Humidity levels drop to around 30-50% in the afternoons, especially in the summer.
Impact on Comfort
High humidity can make hot temperatures feel even hotter, while low humidity might make cooler temperatures feel more comfortable. Understanding these patterns helps residents prepare for daily activities and manage comfort levels more effectively.
Average Wind In Modesto, California
Wind in Modesto is generally mild. Throughout the year, average wind speeds vary.
Average Wind Speed:
- The wind typically ranges from calm to a gentle breeze.
- Average wind speed is about 6 to 9 mph.
Wind Variation:
- The wind speed can peak in March, which is often considered the windiest month.
- During this month, wind speeds can reach up to 11 mph.
Seasonal Differences:
- In the summer, the wind tends to be lighter.
- Winter months can see slightly stronger winds, especially during storms.
Wind Direction:
- Predominantly comes from the northwest.
- There are occasional variations based on weather patterns.
Average Air Quality In Modesto, California
The air quality in Modesto, California is generally considered to be good. On most days, the Air Quality Index (AQI) stays in the range of 0-50, which is categorized as “Good”.
Key Factors
- PM2.5 Levels: Particulate matter with a diameter of less than 2.5 micrometers (PM2.5) is usually low. Average levels often hover around 10 µg/m³.
- PM10 Levels: Larger particles, known as PM10, also tend to stay within safe limits at approximately 33 µg/m³.
Weather Conditions
- Temperature: Temperatures can vary widely. During summer, highs can reach up to 100°F, while winter temperatures often drop to around 40°F.
- Wind: Winds in Modesto typically average about 15.7 mph, helping to disperse pollutants and maintain good air quality.
Atmospheric Conditions
- Pressure: Barometric pressure in Modesto is usually stable, contributing to constant air quality trends.
- Visibility: High visibility conditions are common, often exceeding 10 miles. This is indicative of clear skies and minimal air particulates.
Real-Time Data
Real-time monitoring provides essential insights into the daily air quality.
For example, IQAir and AccuWeather offer real-time data and forecasts that are useful for planning outdoor activities.
Topography Of Modesto, California
Modesto is located in the Central Valley of California. The city sits at an elevation of about 89 feet above sea level. Its position offers a relatively flat landscape, which is typical of the Central Valley.
Modesto lies approximately at a latitude of 37.6391° N and a longitude of 120.9969° W. This geographical positioning places it firmly within the San Joaquin Valley.
The area surrounding Modesto is predominantly agricultural, thanks to the fertile soil. The Stanislaus River flows to the north of the city, adding to its agricultural potential.
There are no major hills or mountains within the immediate vicinity, which contributes to the primarily flat topography. This makes irrigation and farming processes straightforward and efficient.
The flat nature of Modesto’s terrain means it is less susceptible to extreme weather conditions like heavy snowfall, though it can still experience significant rainfall during the wet season.
Most of the urban area is composed of residential neighborhoods, small businesses, and vast stretches of farmland. The terrain gently slopes towards the river areas, ensuring natural water drainage.
Extreme Weather Events That Occur In Modesto, California
High Temperatures
During summer, Modesto often experiences high temperatures.
In July 2024, the city endured its warmest July on record, with average temperatures reaching 100.2°F.
Heat Waves
Heat waves are a common occurrence.
The National Weather Service regularly issues excessive heat warnings for the region. These warnings advise residents to stay hydrated and avoid outdoor activities during peak hours.
Drought
Periods of drought also affect Modesto.
Drought conditions can lead to reduced water availability and impact agriculture. This exacerbates the need for water conservation measures.
Wildfires
Wildfires are a significant threat, especially during dry seasons.
The increased risk is linked to rising temperatures and prolonged drought. California’s wildfire season has become more intense over the years, affecting surrounding areas.
Flooding
Though less frequent, flooding can occur, particularly during heavy rainfall.
Flood events can overwhelm drainage systems and lead to property damage.
Air Quality
Poor air quality is often linked to wildfire smoke and high levels of ozone.
During extreme heat and fire seasons, air quality can drop to unhealthy levels, impacting vulnerable populations.
Best Time Of The Year To Visit Modesto, California
Modesto offers a varied climate throughout the year, making it important to consider the different seasons when planning a visit. Each season has distinct weather patterns that can influence travel plans and activities.
What Is Modesto, California Like In Spring
Spring in Modesto, from March to May, is mild and pleasant.
During this time, temperatures range from the mid-50s to mid-70s in Fahrenheit. March and April experience average highs around 70°F to 75°F, while May can see temperatures reaching up to 80°F.
Rainfall is more common in early spring, but by May, it lessens significantly.
This season is well-suited for outdoor activities like visiting local parks or taking a walk along the Tuolumne River. Spring blossoms are vibrant, making it an ideal time for nature enthusiasts and photographers.
What Is Modesto, California Like In Summer
Summers in Modesto, encompassing June through August, are hot with temperatures often above 90°F.
July is typically the hottest month with average highs around 95°F. The days are dry and sunny, with very little rainfall, providing clear skies and lots of sunlight.
This season is great for pool activities, visiting local vineyards, or enjoying water-based recreation at Don Pedro Lake.
Despite the heat, evenings can be cooler, dropping to the 60s. A visit to Modesto in summer should include sunscreen and plenty of water.
What Is Modesto, California Like In Fall
Fall, from September to November, brings moderate temperatures and is one of the best times to visit Modesto.
September still has summer-like weather, with highs around 85°F. By October, temperatures drop to a more comfortable range from the 60s to low 80s.
November sees the beginning of cooler weather, with highs in the low 60s and some chances of rain.
The fall colors enhance the beauty of the area, making it perfect for exploring local parks and trails. Harvest season activities in the surrounding agricultural areas are also notable during this time.
What Is Modesto, California Like In Winter
Winter in Modesto, between December and February, is mild compared to other regions.
The coldest month is January, with average highs around 56°F and lows near 38°F. December and February have similar temperature ranges, staying between 50°F and 60°F during the day.
Rainfall is more frequent, so it’s a good idea to carry an umbrella. While the weather may limit some outdoor activities, it’s a great time for indoor attractions like museums or theaters.
Winter offers a quiet and serene atmosphere, making it a relaxing time to visit.