USA

Best time to visit San Francisco

Based on 12 years of real historical weather data (2015–2026). Sunshine hours, rainfall, and temperature — week by week.

⭐ Best week

W36 · Sep 2–8

🌡 21.0°C avg☀️ 11.6h sun/day🌧 0.0mm/day

Weather score: 94/100

19.5°C

Avg summer temp

14.1°C

Avg winter temp

10.3h

Avg sunshine / day

1.6mm

Avg rainfall / day

Month-by-month weather

January70/100

🌡 13.8°C☀️ 7.0h🌧 Moderate rain

February70/100

🌡 14.8°C☀️ 8.5h🌧 Moderate rain

March81/100

🌡 15.9°C☀️ 9.8h🌧 Light showers

April83/100

🌡 16.2°C☀️ 11.2h🌧 Light showers

May87/100

🌡 17.4°C☀️ 12.8h🌧 Dry

June90/100

🌡 19.1°C☀️ 13.3h🌧 Dry

July90/100

🌡 19.0°C☀️ 13.0h🌧 Dry

August93/100

🌡 20.1°C☀️ 12.3h🌧 Dry

September94/100

🌡 21.1°C☀️ 11.4h🌧 Dry

October94/100

🌡 20.4°C☀️ 9.6h🌧 Dry

November81/100

🌡 16.0°C☀️ 8.3h🌧 Light showers

December60/100

🌡 13.4°C☀️ 6.6h🌧 Moderate rain

All weeks ranked by weather score

Week	Dates	Avg temp	Range	Sun / day	Rain / day	Score
W36	Sep 2–8	21.0°C	13.7°–26.6°	11.6h	0.0mm	94
W39	Sep 23–29	21.7°C	12.5°–28.2°	11.2h	0.1mm	94
W40	Sep 30–Oct 6	22.0°C	11.9°–26.8°	10.4h	0.5mm	94
W35	Aug 26–Sep 1	21.0°C	13.6°–24.9°	12.0h	0.0mm	93
W37	Sep 9–15	21.1°C	13.4°–25.0°	11.3h	0.1mm	93
W38	Sep 16–22	20.6°C	12.9°–24.7°	11.3h	0.2mm	93
W34	Aug 19–25	20.5°C	13.5°–24.6°	12.2h	0.0mm	92
W33	Aug 12–18	20.3°C	13.4°–24.0°	12.2h	0.0mm	91
W24	Jun 10–16	19.7°C	11.8°–24.0°	13.4h	0.0mm	90
W28	Jul 8–14	19.2°C	12.7°–21.8°	13.2h	0.0mm	90
W29	Jul 15–21	19.3°C	12.7°–22.1°	13.1h	0.1mm	90
W32	Aug 5–11	19.5°C	13.3°–22.0°	12.6h	0.0mm	90
W41	Oct 7–13	20.3°C	11.8°–24.8°	10.0h	0.5mm	90
W25	Jun 17–23	19.1°C	11.9°–22.6°	13.5h	0.0mm	89
W27	Jul 1–7	19.1°C	12.2°–22.3°	13.3h	0.0mm	89
W31	Jul 29–Aug 4	19.3°C	12.7°–22.4°	12.4h	0.0mm	89
W23	Jun 3–9	18.8°C	11.3°–23.5°	13.0h	0.0mm	88
W26	Jun 24–30	18.6°C	12.0°–21.3°	13.3h	0.0mm	88
W30	Jul 22–28	18.6°C	12.8°–20.7°	12.5h	0.0mm	88
W22	May 27–Jun 2	18.3°C	10.9°–21.5°	13.1h	0.1mm	87
W43	Oct 21–27	19.7°C	11.3°–23.6°	9.0h	0.9mm	86
W19	May 6–12	17.2°C	10.0°–21.1°	13.1h	0.2mm	85
W21	May 20–26	17.3°C	10.7°–20.2°	13.0h	0.2mm	85
W44	Oct 28–Nov 3	19.1°C	9.8°–21.7°	8.9h	0.5mm	85
W16	Apr 15–21	16.5°C	8.9°–20.3°	11.7h	0.9mm	83
W18	Apr 29–May 5	17.0°C	9.8°–20.0°	12.3h	0.8mm	83
W42	Oct 14–20	20.7°C	11.4°–26.6°	9.5h	2.3mm	83
W17	Apr 22–28	16.4°C	9.3°–19.2°	12.1h	0.9mm	82
W20	May 13–19	17.2°C	10.3°–20.1°	12.5h	1.0mm	82
W13	Mar 25–31	16.7°C	8.0°–19.8°	11.0h	1.4mm	81
W45	Nov 4–10	17.6°C	9.2°–20.0°	9.2h	1.3mm	81
W15	Apr 8–14	15.6°C	8.1°–18.9°	10.8h	1.8mm	77
W14	Apr 1–7	16.2°C	7.8°–20.1°	10.2h	2.1mm	76
W11	Mar 11–17	15.9°C	7.4°–19.5°	9.5h	2.5mm	73
W12	Mar 18–24	16.0°C	7.9°–18.7°	10.0h	2.8mm	73
W4	Jan 22–28	14.1°C	5.9°–16.5°	8.0h	1.5mm	70
W8	Feb 19–25	14.2°C	5.9°–17.5°	9.5h	2.3mm	70
W46	Nov 11–17	16.3°C	7.9°–18.8°	7.8h	2.4mm	69
W47	Nov 18–24	16.1°C	7.7°–18.2°	8.2h	3.3mm	66
W6	Feb 5–11	15.4°C	6.4°–17.3°	8.2h	3.2mm	65
W9	Feb 26–Mar 3	14.6°C	6.7°–17.6°	8.6h	3.2mm	64
W10	Mar 4–10	15.1°C	6.9°–18.0°	8.6h	3.5mm	64
W48	Nov 25–Dec 1	13.9°C	6.1°–15.9°	7.9h	2.6mm	64
W5	Jan 29–Feb 4	14.9°C	5.9°–17.3°	7.8h	3.4mm	62
W49	Dec 2–8	14.1°C	6.3°–16.2°	7.0h	2.9mm	60
W7	Feb 12–18	14.8°C	6.6°–17.3°	8.4h	4.3mm	58
W3	Jan 15–21	13.9°C	6.2°–16.2°	7.3h	4.2mm	54
W51	Dec 16–22	13.2°C	5.0°–15.1°	6.4h	3.6mm	54
W2	Jan 8–14	14.0°C	6.5°–15.7°	6.7h	4.3mm	53
W50	Dec 9–15	13.5°C	5.7°–15.7°	7.0h	4.3mm	53
W1	Jan 1–7	13.1°C	5.3°–14.8°	6.2h	5.6mm	45
W52	Dec 23–29	13.0°C	4.9°–14.7°	6.1h	6.7mm	42

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