San Francisco Weather

2026 (This Year)

Historical data
Average Temperature
18.2 °C
High
/
11.3 °C
Low
340.7mm
Precipitation
31.1°C
Peak Temp
5.2°C
Low Temp
224
Days Count

Seasonal Breakdown

Average temperatures and precipitation by season

Spring

92 days
19.4°C
Avg High
/
11.6°C
Avg Low
Precipitation
148.3mm

Summer

73 days
18.8°C
Avg High
/
13.0°C
Avg Low
Precipitation
6.2mm

Winter

59 days
15.5°C
Avg High
/
8.6°C
Avg Low
Precipitation
186.2mm

Seasons based on meteorological calendar: Spring (Mar-May), Summer (Jun-Aug), Autumn (Sep-Nov), Winter (Dec-Feb)

Monthly Breakdown

Average temperatures and precipitation by month

January

31 days
15.0°C / 8.1°C
Avg High / Low
Precipitation
74.3mm

February

28 days
16.2°C / 9.2°C
Avg High / Low
Precipitation
111.9mm

March

31 days
22.5°C / 11.4°C
Avg High / Low
Precipitation
9.4mm

April

30 days
17.8°C / 11.5°C
Avg High / Low
Precipitation
117.7mm

May

31 days
18.0°C / 12.0°C
Avg High / Low
Precipitation
21.2mm

June

30 days
18.9°C / 12.7°C
Avg High / Low
Precipitation
1.0mm

July

31 days
18.5°C / 13.0°C
Avg High / Low
Precipitation
5.2mm

August

12 days
19.1°C / 13.7°C
Avg High / Low
Precipitation
0.0mm

Temperature Trends

Daily high, low, and average

Weather Extremes

Most notable conditions during this period

Period High

31.1°C
Tuesday, March 17

Coolest Day

10.1°C
Wednesday, February 18

Period Low

5.2°C
Friday, February 20
Progress 0%
0 / 0 years
Analyzing Historical Data

Analyzing 15 years of historical data...

Analysis Period

Years: 15
Location: San Francisco
Period: 2026-01-01 to 2026-08-12

Weather Insights

Key findings from analysis for selected period

Highly Variable Temperatures

Worth noting

Temperature swings from 5.2°C to 31.1°C (25.9°C range).

📅

Seasonal Weather Patterns

Info
Rainfall Patterns:
Wettest: April (118mm), February (112mm)
Driest: June (1mm), July (5mm)

Temperature Patterns (Monthly Averages):
Hottest months: March (22.5°C), June (18.9°C)
Coolest months: January (15.0°C), February (16.2°C)

Travel Recommendations:
Best visiting months: March, August, June (optimal temperature and rainfall balance).
⚠️

3 Exceptional Weather Events

Info

The most extreme days in this period:

Mar 17 Heat

Hottest day: 31.1°C

Feb 16 Rain

Heavy rain: 30.2mm in one day

Apr 20 Rain

Heavy rain: 43.0mm in one day

1 High Heat Index Day

Info

1 day where humidity amplified heat sensation (35.1°C heat index). 31.1°C temperature felt like 35.1°C due to 60% humidity.

High Humidity Levels

Info

Average humidity of 76% indicates persistently moist air conditions. Heat sensation amplified during warm periods (18.2°C average temperature). Humidity varied significantly (22%-95% range).

📊

Highly Variable Humidity

Info

Large humidity swings (22%-95%) for a year. Conditions ranged from very dry to very humid.

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Global Weather Data

Features

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Data Source

Weather data provided by Open-Meteo, offering reliable historical weather information from meteorological stations worldwide.

Data accuracy and availability may vary by location and time period.

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