Pittsburg Weather

March through May are your sweet spot. March hits an impressive 92/100 comfort score with highs around 71°F and abundant sunshine at 11 hours daily. April and May stay just as appealing with highs in the upper 70s to low 80s and virtually no morning fog. Summer extends the warmth (highs in the upper 80s), but October starts the decline into rainy season. You'll find about 267 perfect weather days annually, concentrated in these spring months and summer.

Pittsburg's low elevation and inland position make it significantly warmer than coastal Bay Area towns. While San Francisco Bay shorelines get wrapped in marine layer fog, Pittsburg sits further inland and benefits from limited morning fog exposure (just 1.4 hours daily on average). Your average comfort score of 83/100 reflects this warmth advantage. The waterfront location means you get the industrial charm of the Delta without the coastal fog that plagues western Bay Area beaches. Check out how Bay Area microclimates vary to understand why nearby Antioch can feel even warmer.

Not at all, actually. Summer highs average in the upper 80s, with July and August typically around 88°F. These temperatures are warm but comfortable, especially with the breeze from the water. The real surprise is that your comfort scores remain high even in peak summer (86/100 in July), thanks to lower humidity and occasional maritime influence. September actually averages 73°F despite being later in the season, which is pleasantly warm without the intense heat you'd find inland. The waterfront position keeps things more moderate than scorching inland valleys.

November takes the crown as the most challenging month, with a comfort score of just 64/100, frequent rain (about 5 inches), and morning fog lasting 4.6 hours daily. December follows closely with similar conditions. October marks the transition with moderate rainfall and the first real fog of the season. However, even 'worst' months here beat many other regions. You're looking at roughly 64 rainy days per year total, leaving plenty of dry spells even during winter. If you can't handle gray November weather, plan your visit for spring or summer instead.

Pittsburg is significantly less foggy than San Francisco. Morning fog averages just 1.4 hours daily across the year, with virtually zero fog from May through August. Even November, the foggiest month, sees morning fog clear by late morning. This is because Pittsburg sits inland from the Golden Gate, away from the marine layer that gets funneled into the bay. You'll enjoy clear mornings here most of the time. For deeper insight into how fog forms along the Northern California coast, the mechanism that creates SF fog simply doesn't dominate your location the same way.

Layering is your strategy year-round. Mornings start cool (averaging 45-55°F), while afternoons warm considerably (60-80°F depending on season). Bring a light jacket or fleece that you'll shed by midday. In summer, shorts and a t-shirt work during the day, but keep a layer for the evening. Winter requires more substantial outerwear since highs only reach the upper 50s. The waterfront means occasional wind, so avoid billowing fabrics. Sunscreen is essential given the 9.6 hours of daily sunshine and high UV index. Pack a rain jacket for October through February when rainfall picks up. Check how dressing in layers works for Bay Area destinations to see why this approach matters.

Pittsburg averages about 64 rainy days per year with concentrated rainfall October through January. November is the wettest month with nearly 5 inches, October brings almost 4 inches, and January adds another 4.9 inches. However, June through May are essentially dry, with negligible precipitation. September can be surprisingly wet (2.2 inches) despite feeling like summer. The waterfront position and inland Delta location mean you get measurable rainfall rather than the perpetual drizzle of coastal areas. Most rainy days aren't all-day storms, so you can plan around the wet season fairly easily.

Antioch, just east of Pittsburg, typically runs warmer and slightly less humid due to being further from water influence. Both towns share similar seasonal patterns and escape the coastal fog that plagues western Bay destinations. Pittsburg's waterfront position provides marginally more moderation, especially on the hottest days. Your comfort scores average 83/100, while Antioch trends a touch higher in peak summer. Nearby Antioch offers essentially comparable weather with minor variations. If you prefer slightly cooler waterfront breezes and want to avoid extreme heat, Pittsburg edges ahead. Both beat the Delta's most intense inland heat.

Spring wins decisively. March through May deliver your best weather window with comfort scores of 89-92/100, abundant sunshine (11-13 hours daily), virtually no fog, and mild 70-80°F temperatures. These months hit the sweet spot between cold winter and hot summer. Fall starts strong (September at 89/100) but deteriorates quickly, with October dropping to 78/100 and November plummeting to 64/100 as rain arrives. By December, comfort dips to 70/100. Spring's consistent beauty and longer daylight hours make it ideal for waterfront exploration and outdoor activities. Visit Black Diamond Mines Regional Preserve nearby when spring conditions peak.

Pittsburg's inland position shields it from the volatile marine layer swings that make San Francisco's weather notorious. You get the maritime influence (moderate temperatures, occasional breezes) without the dramatic fog banks that flip San Francisco from 50°F to 75°F in hours. The Delta and Suisun Bay geography create a warmer microclimate that doesn't experience the extreme cool-downs. Your average high of 73.5°F and low of 52.1°F represent genuinely stable conditions. This consistency is why your comfort score averages 83/100, among the Bay Area's highest. Understanding Bay Area microclimates explains how geography creates these pockets of predictable weather.

April onwards is prime outdoor dining season. April highs reach near 80°F with minimal fog and bright sunshine, making evening meals pleasant even as temperatures drop to mid-50s. May through September offer the most comfortable outdoor dining, with highs in the 80s and calm conditions. June and July stay in the mid-80s but can feel a touch humid on occasion. Even in March, sunny 71°F afternoons work for lunch. October still supports pleasant outdoor meals, though evenings cool quickly. November through February gets marginal, with highs in the 54-60°F range. Plan waterfront dining March through October for genuinely comfortable experiences.