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Best time to visit · California, United States
On the climate data, the best time to visit Downtown San Diego & Gaslamp Quarter is October – March, scoring up to 93/100 with highs around 67°F (20°C) and 1.6 in (41 mm) of rain in January. April – June and September are good shoulder-season months. The toughest months are July & August, mainly because of cloud cover.
Highs run from 66°F to 89°F across the year, and the yearly total is about 10.6 in (268 mm) of rain.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high | 67°F20°C | 67°F20°C | 71°F21°C | 73°F23°C | 76°F25°C | 82°F28°C | 88°F31°C | 89°F32°C | 88°F31°C | 81°F27°C | 73°F23°C | 66°F19°C |
| Avg low | 50°F10°C | 51°F10°C | 52°F11°C | 54°F12°C | 56°F14°C | 60°F15°C | 66°F19°C | 67°F19°C | 66°F19°C | 61°F16°C | 56°F13°C | 50°F10°C |
| Rain | 1.6 in41 mm | 2.2 in55 mm | 1.1 in29 mm | 0.7 in17 mm | 0.3 in7 mm | 0.6 in14 mm | 0.2 in4 mm | 0.2 in4 mm | 0.2 in6 mm | 0.6 in15 mm | 1.0 in25 mm | 2.0 in51 mm |
| Humidity | 64% | 66% | 68% | 68% | 68% | 63% | 58% | 57% | 57% | 60% | 60% | 64% |
| Cloud | 50% | 56% | 60% | 60% | 72% | 81% | 75% | 69% | 59% | 54% | 50% | 51% |
| Comfort | 93 | 90 | 90 | 90 | 86 | 80 | 68 | 67 | 75 | 92 | 93 | 92 |
Source: NASA POWER (public domain), 2001–2025 monthly averages on a ~50 km satellite and reanalysis grid, so coasts and valleys can differ from what's shown. Temperatures were adjusted from the grid cell's ~394 m (1,293 ft) to Downtown San Diego & Gaslamp Quarter's ~10 m (33 ft) elevation using the standard lapse rate of 6.5°C per 1,000 m. Precipitation includes snow as melted water; daylight is calculated from latitude. Check a forecast before you go.
The coldest season, with highs of 66–67°F (19–20°C) and lows down to 50°F (10°C). It's the wettest season, with about 5.8 in (147 mm) of rain, 55% of the year's total. December – February are among the best-scoring months (season average 92/100).
Temperatures climb through the season, from 71°F highs in March to 76°F by May. About 2.1 in (53 mm) of rain falls across these months, 20% of the year's total. Lows bottom out around 52°F (11°C). Comfort peaks here: March ranks with the year's best, and the season averages 89/100.
The warmest stretch of the year, with highs of 82–89°F (28–32°C). It's the driest season, with only about 0.9 in (22 mm) of rain, 8% of the year's total. Lows bottom out around 60°F (15°C). It holds the toughest stretch on our comfort score (July & August), averaging 72/100.
Temperatures slide from 88°F highs in September to 73°F by November. About 1.8 in (46 mm) of rain falls across these months, 17% of the year's total. Lows bottom out around 56°F (13°C). Comfort peaks here: October & November rank with the year's best, and the season averages 87/100.
By comfort score: 10 Great and 2 Good. Great months: September – June. Tap a month for its own guide.
On the climate data, the best time to visit Downtown San Diego & Gaslamp Quarter is October – March, scoring up to 93/100 with highs around 67°F (20°C) and 1.6 in (41 mm) of rain in January. April – June and September are good shoulder-season months. The toughest months are July & August, mainly because of cloud cover.
February is the wettest month, averaging about 2.2 in (55 mm) of rain. July is the driest, with about 0.2 in (4 mm). The yearly total is around 10.6 in (268 mm).
January is the coldest, with average lows of 50°F (10°C) and highs of 67°F (20°C). The warmest is August, with average highs of 89°F (32°C).
Not very: summer (June – August) humidity averages 59%, and highs peak around 89°F (32°C), so heat matters more than mugginess.
The wettest three-month stretch is December – February, with about 5.8 in (147 mm) of rain combined. The driest stretch is July – September, with about 0.6 in (14 mm).
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