Rio Vista Weather

TownSan Francisco Bay Area

Delta town known for wind and bridges

78°
🙂
Comfort Score
83(B)
Great
Weather updated June 30, 2026 at 6:16 PM PDT

Current Conditions

Temperature
78°F
Feels like 76°F
Humidity
37%
Wind
16 mph
NW • Gusts 23 mph
Cloud Cover
0%
Precip Chance
0%

Comfort Breakdown

Temperature94
Wind25
Sunshine100
Humidity100
Precipitation100

Hourly Forecast

Today

TimeTempComfortWindPrecipConditions
Now79°81 (B)16 mph0%☀️ Sunny
7pm76°88 (A-)15 mph0%☀️ Sunny
8pm72°88 (A-)12 mph0%☀️ Sunny
9pm67°89 (A-)10 mph0%☀️ Sunny
10pm65°84 (B)11 mph0%☀️ Sunny
11pm64°81 (B)14 mph0%☀️ Sunny

Tomorrow

TimeTempComfortWindPrecipConditions
12am63°79 (B)14 mph0%☀️ Sunny
1am62°86 (A-)6 mph0%☀️ Sunny
2am59°84 (B)3 mph0%☀️ Sunny
3am58°83 (B)4 mph0%☀️ Sunny
4am57°81 (B)3 mph0%☀️ Sunny
5am57°77 (B)7 mph0%☀️ Sunny

7-Day Forecast

DayHigh/LowComfortPrecipConditions
Today86° / 59°71 (B-)0%☀️ Sunny
Wed🏆 Best87° / 57°73 (B-)0%☀️ Sunny
Thu90° / 55°66 (C)0%☀️ Sunny
Fri91° / 53°61 (C)0%☀️ Sunny
Sat93° / 55°66 (C)0%☀️ Sunny
Sun92° / 55°66 (C)0%☀️ Sunny
Mon87° / 54°64 (C)0%☀️ Sunny

Best day this week: Wed (Comfort score: 73)

Nearby Temperature Comparison

Conditions at nearby San Francisco Bay Area destinations

Tip: Bay Area temps can vary 20-30°F within a short distance due to microclimates.

Climate Dashboard

Current conditions vs. rolling 28-day window

Today's High vs Normal
86°Fforecast
1° below normal
Normal: 87°F
Rainfall Year-to-Date
13.3"
175% above average
30-yr avg: 4.8"
Sunny Days
22last 28 days
3 fewer than baseline
Recent baseline: 25
Foggy Days
5last 28 days
vs 3 recent baseline
Foggier than usual
Avg Wind Speed
8.3 mphlast 28 days
Typical conditions
Recent baseline: 9.3 mph
Comfort Score
8828-day avg
On par with typical
Recent baseline: 90

Historical Climate Data

Long-term weather patterns and climate data

Data sources: NOAA URMA for recent temperature history, NOAA Stage IV for recent precipitation, NOAA HRRR for fog, cloud, wind, humidity, and sunshine signals, and NOAA 1991-2020 climate normals for long-term baselines.

Climate Overview

Based on 627 days (2024-08-22 to 2026-05-10)

82
Avg Comfort
71.2°
Avg High
50.4°
Avg Low
70%
Perfect Days
☀️ Avg Sunshine (recent)9.2h/day
🌫️ Avg Fog (recent)1.6h/day
💧 Total Rain46.62"
🌧️ Rainy Days121 (19%)
🌫️ Foggy Days124
✨ Perfect Days (80+)438

🌟 Best Months

1. March 202694
74.7° / 52.5° · ☀️ 10.9h
1 foggy days · 2 rainy days
2. April 202591
70.4° / 49.2° · ☀️ 10.9h
4 foggy days · 4 rainy days
3. May 202590
80.6° / 53.6° · ☀️ 13h
0 foggy days · 2 rainy days

⚠️ Challenging Months

1. December 202561
53.5° / 43.4° · ☀️ 3.9h
💧 5.66" · 10 rainy days · 23 foggy days
2. January 202669
56.7° / 42.6° · ☀️ 5.8h
💧 3.6" · 7 rainy days · 20 foggy days
3. December 202469
57.4° / 43.1° · ☀️ 5.4h
💧 5.75" · 12 rainy days · 20 foggy days

Monthly Breakdown

MonthComfortHigh/Low☀️ Sun🌫️ Fog💧 RainPerfect
August 20248787.1° / 59.1°11.5h0d0.15"9
September 20248588° / 57.4°11.1h2d0.03"24
October 20248783.2° / 57.2°9.9h0d0.24"24
November 20248062.5° / 45°7.1h3d4.46"22
December 20246957.4° / 43.1°5.4h20d5.75"11
January 20258158.2° / 39.5°7.7h8d0.82"22
February 20257659.8° / 43.9°6.6h3d5.82"16
March 20258161.7° / 45.3°9h2d2.57"18
April 20259170.4° / 49.2°10.9h4d0.47"26
May 20259080.6° / 53.6°13h0d0.15"31
June 20258883.9° / 54.7°13.7h0d0"30
July 20258783.6° / 56.3°13.2h2d0.01"30
August 20258490.2° / 59.2°12.5h0d0"27
September 20258786° / 60.7°10.7h1d0.12"27
October 20258872.8° / 54.6°8.2h4d3.07"24
November 20257663.3° / 49.8°5.8h13d4.01"17
December 20256153.5° / 43.4°3.9h23d5.66"3
January 20266956.7° / 42.6°5.8h20d3.6"7
February 20267461.9° / 45.7°6.6h13d4.5"11
March 20269474.7° / 52.5°10.9h1d0.89"29
April 20268668.4° / 50.2°10.7h3d3.59"22
May 20268872.7° / 53°10.9h2d0.71"8
Last updated: 5/10/2026

Climate Trends

Average Temperature by Month

95°F80°F65°F50°F34°FAug '24Sep '24Oct '24Nov '24Dec '24Jan '25Feb '25Mar '25Apr '25May '25Jun '25Jul '25Aug '25Sep '25Oct '25Nov '25Dec '25Jan '26Feb '26Mar '26Apr '26May '26
Average High
Average Low

Location Details

📍
Coordinates
38.1758, -121.6961
⛰️
Elevation
20 ft
🏷️
Type
Town
🏷️
Tags
#sunny#windy#waterfront#delta
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