Weather forecast for todayPetaluma, CA

Weather forecast for today

Current condition 6:45 am PDT

  • 45°F
  • Feels like:
    45°F
Clear
Clear
  • Precipitation: 0"
  • Wind: 0mphS 180°
  • Humidity: 89%
  • Dewpoint: 41°F
  • Pressure: 30.07"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
In Petaluma, at the moment, a perfect day unfolds under completely clear skies.
The temperature is a frosty 44.6°F. The current temperature is almost at the minimum-expected 46.4°F for today.

Saturday Oct 17, 2026

  • 90°F
  • 46°F
Sunny
Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 9mphSSE 148°
  • Humidity: 44%
  • UV index: 5
  • Sunrise: 7:21 am PDT
  • Sunset: 6:30 pm PDT
  • ▼
On Saturday, October 17, skies are expected to be clear and full of sunshine.
Temperatures will show considerable variation, extending from a high of a hot 89.6°F to a low of a brisk 46.4°F.
The maximum heat index, which reflects the perceived temperature due to humidity levels, is calculated to be a hot 91.4°F. Take into consideration that the heat index values are calculated for shade and light wind conditions.
Today, the predicted high will be higher and much closer to September's average high of 77.2°F than October's 71.2°F.
Sunrise will be at 7:21 am and sunset at 6:30 pm; the daylight will last for 11h and 8min.

Hourly overview

Hourly temperatures

Warmest hour: 3 pm 88°C.
Coldest hour: 7 am 45°C.

Chance of precipitation

Highest chance: 11 pm 6%.

Hourly weather forecast

  • 7 am
  • 45°F
  • Feels like:
    45°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 0mphNE 49°
  • Humidity: 87%
  • Pressure: 30.06"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunrise: 7:21 am
  • 8 am
  • 46°F
  • Feels like:
    46°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 0mphN 9°
  • Humidity: 86%
  • Pressure: 30.06"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 9 am
  • 55°F
  • Feels like:
    55°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 1mphNE 43°
  • Humidity: 63%
  • Pressure: 30.06"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 10 am
  • 66°F
  • Feels like:
    66°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 1mphE 97°
  • Humidity: 42%
  • Pressure: 30.06"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 11 am
  • 75°F
  • Feels like:
    75°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 3mphESE 123°
  • Humidity: 29%
  • Pressure: 30.06"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 12 pm
  • 81°F
  • Feels like:
    81°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 3mphSE 129°
  • Humidity: 23%
  • Pressure: 30.03"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 1 pm
  • 86°F
  • Feels like:
    86°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 3mphSE 137°
  • Humidity: 19%
  • Pressure: 30.03"Hg
  • Visibility: 10mi
  • UV index: 5
  • ▼
  • 2 pm
  • 88°F
  • Feels like:
    88°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 4mphSSW 197°
  • Humidity: 17%
  • Pressure: 30"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 3 pm
  • 88°F
  • Feels like:
    88°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 7mphWSW 256°
  • Humidity: 18%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 4 pm
  • 86°F
  • Feels like:
    86°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 9mphW 269°
  • Humidity: 20%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 5 pm
  • 81°F
  • Feels like:
    81°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 9mphW 269°
  • Humidity: 25%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 6 pm
  • 73°F
  • Feels like:
    73°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 7mphW 267°
  • Humidity: 38%
  • Pressure: 29.94"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:30 pm
  • 7 pm
  • 66°F
  • Feels like:
    66°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 6mphW 275°
  • Humidity: 53%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 8 pm
  • 61°F
  • Feels like:
    61°F
Clear
Clear
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 4mphWNW 284°
  • Humidity: 68%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 9 pm
  • 57°F
  • Feels like:
    57°F
Clear
Clear
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 4mphWNW 287°
  • Humidity: 77%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 55°F
  • Feels like:
    55°F
Clear
Clear
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 3mphWNW 290°
  • Humidity: 82%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 11 pm
  • 55°F
  • Feels like:
    55°F
Clear
Clear
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 2mphWNW 300°
  • Humidity: 85%
  • Pressure: 29.97"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Today, mainly sunny weather and a cloudless sky are anticipated.
The temperature will be between the highest temperature of 87.8°F and the lowest temperature of 44.6°F. The hottest part of the day will be at 2 pm and 3 pm.
The highest temperature is more similar to September's average maximum of 77.2°F than October's usual of 71.2°F. Today, the overnight low is more similar to November's usual minimum of 47.3°F than October's 52.7°F.
Updated: Oct 17, 2026 @ 13:45:36 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

The temperature at 6:45 am PDT is 44.6°F.

On Saturday, clear and sunny conditions are expected.

Today, the maximum temperature will be 89.6°F, while the minimum temperature will be 46.4°F. The maximum heat index, which calculates the temperature value influenced by the moisture in the air, is calculated to be 91.4°F.
The maximum temperature will be noticeably higher than the average highest temperature of 71.2°F in October. The lowest temperature today will be slightly cooler than the average low temperature.

On Saturday, in Petaluma, sunrise will be at 7:21 am and sunset at 6:30 pm (PDT).

In Petaluma, today, there will be 11h and 8min of daylight.