Hottest (avg)
#8 / 12
Sits around the middle of the year.
April in context
How it compares to the rest of the year in San Diego.
Wettest (avg)
#6 / 12
Typical rainfall for the year.
Daylight Hours
#5 / 12
Around the yearly average.
Windiest (avg)
#2 / 12
Among the windier months.
Highest UV
#5 / 12
Near the middle of the yearly UV range.
Most Humid
#10 / 12
One of the less humid months.
Monthly climate breakdown
A detailed look at the typical climate conditions for April.
Thermal profile
Temperature
Typical daytime high
- Nighttime low
-
- Feels like (avg)
-
Light window
Sunshine
13 h
Average daylight
- UV index (max)
- 8
- Typical sun hours
- 05:17 - 18:18
Wet-day pattern
Rain & Snow
Typical rainfall
- Rainy days
- 6 days
- Cloud cover (avg)
- 44%
Air feel
Humidity & Wind
74%
Average humidity
- Wind (avg)
-
- Wind (max gusts)
-
Historical daily baseline
Daily climate explorer
Pick a day to inspect the usual conditions through April in San Diego. Based on a 30-year historical climate baseline, not a forecast.
Primary control
Select a day
Scroll to compare daily conditions. The summary updates with your selection.
Secondary context
Monthly trend
Median daytime highs across the month, with a softer low line.
Median temperatureMedian lowTypical range
Day 15 selected for April. Temperature 18.4°C.
Historical disruption baseline
Typical disruptions in April
Based on 30 years of historical data, these are the disruption patterns most likely to affect plans in April.
Rain High impact
Washout risk Measures: Washout day risk. Observed about 5% of days (1.5 days/month) in April. Historical risk signal only, not a day-by-day forecast.
Likely frequency
1.5 days / month
- Share of days
- ~5% of days
- Upper edge
- Up to ~24mm (P95)
Why this matters
Washout conditions are possible on ~2 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain Moderate
Rain disruption Measures: Likely rain disruption days. Observed about 5% of days (1.5 days/month) in April. Historical risk signal only, not a day-by-day forecast.
Likely frequency
1.5 days / month
- Share of days
- ~5% of days
- Upper edge
- Up to ~24mm (P95)
Why this matters
Rain disruption risk appears on ~2 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Show all disruptions (14 more)
Wind High impact
Stormy conditions Measures: Storm-impact proxy days. Observed about 1% of days (0.4 days/month) in April. Historical risk signal only, not a day-by-day forecast.
Likely frequency
0.4 days / month
- Share of days
- ~1% of days
- Upper edge
- Up to ~66km/h (P95)
Why this matters
Stormy conditions are possible on ~0 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Rain High impact
Washout run Measures: Multi-day washout runs. Observed about 0.3 days/month in April. Historical risk signal only, not a day-by-day forecast.
Likely frequency
0.3 days / month
- Share of days
- —
- Upper edge
- Up to ~34mm (P95)
Why this matters
Multi-day washout runs are possible on ~0 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain Moderate
Heavy rain days Measures: Heavy rain days (>=10mm). Observed about 2% of days (0.7 days/month) in April. Historical risk signal only, not a day-by-day forecast.
Likely frequency
0.7 days / month
- Share of days
- ~2% of days
- Upper edge
- Up to ~25mm (P95)
Why this matters
Heavy rain is possible on ~1 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Cold Moderate
Cold feels-like nights Measures: Cold feels-like nights (min <=5C). Observed about 2% of days (0.5 days/month) in April. Historical risk signal only, not a day-by-day forecast.
Likely frequency
0.5 days / month
- Share of days
- ~2% of days
- Upper edge
- Up to ~5°C (P95)
Why this matters
Cold feels-like nights are possible on ~0 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Wind Moderate
Strong gusts Measures: Strong gust days (>=60 km/h). Observed about 1% of days (0.2 days/month) in April. Historical risk signal only, not a day-by-day forecast.
Likely frequency
0.2 days / month
- Share of days
- ~1% of days
- Upper edge
- Up to ~66km/h (P95)
Why this matters
Strong gusts are possible on ~0 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Cloud Minor
Cloudy days Measures: Cloudy days (cloud cover >=60%). Observed about 33% of days (9.9 days/month) in April. Historical risk signal only, not a day-by-day forecast.
Likely frequency
9.9 days / month
- Share of days
- ~33% of days
- Upper edge
- Up to ~94% (P95)
Why this matters
Cloudy skies are possible on ~10 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Humidity Minor
High humidity Measures: High humidity days (RH >=80%). Observed about 29% of days (8.7 days/month) in April. Historical risk signal only, not a day-by-day forecast.
Likely frequency
8.7 days / month
- Share of days
- ~29% of days
- Upper edge
- Up to ~88% (P95)
Why this matters
High humidity is possible on ~9 days. Comfort and pace can drop quickly, so plan shorter outdoor blocks with air-conditioned backup stops.
Rain Minor
Wet days Measures: Wet days (>=0.1mm). Observed about 25% of days (7.4 days/month) in April. Historical risk signal only, not a day-by-day forecast.
Likely frequency
7.4 days / month
- Share of days
- ~25% of days
- Upper edge
- Up to ~13mm (P95)
Why this matters
Measurable rain is possible on ~7 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Wind Minor
Gusty days Measures: Gusty days (>=40 km/h). Observed about 21% of days (6.4 days/month) in April. Historical risk signal only, not a day-by-day forecast.
Likely frequency
6.4 days / month
- Share of days
- ~21% of days
- Upper edge
- Up to ~59km/h (P95)
Why this matters
Gusty conditions are possible on ~6 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Rain Minor
Rainy hours Measures: Rain-hours signal (>=3h rain). Observed about 18% of days (5.5 days/month) in April. Historical risk signal only, not a day-by-day forecast.
Likely frequency
5.5 days / month
- Share of days
- ~18% of days
- Upper edge
- Up to ~19h (P95)
Why this matters
Several rainy hours are possible on ~6 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Cloud Minor
Mostly cloudy days Measures: Mostly cloudy days (cloud cover >=80%). Observed about 13% of days (4.0 days/month) in April. Historical risk signal only, not a day-by-day forecast.
Likely frequency
4.0 days / month
- Share of days
- ~13% of days
- Upper edge
- Up to ~98% (P95)
Why this matters
Mostly cloudy skies are possible on ~4 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Rain Minor
Wet most of day Measures: Wet-most-of-day signal (>=6h rain). Observed about 13% of days (3.8 days/month) in April. Historical risk signal only, not a day-by-day forecast.
Likely frequency
3.8 days / month
- Share of days
- ~13% of days
- Upper edge
- Up to ~20h (P95)
Why this matters
Wet-most-of-day conditions are possible on ~4 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Cloud Minor
Overcast days Measures: Overcast days (cloud cover >=95%). Observed about 2% of days (0.5 days/month) in April. Historical risk signal only, not a day-by-day forecast.
Likely frequency
0.5 days / month
- Share of days
- ~2% of days
- Upper edge
- Up to ~100% (P95)
Why this matters
Overcast skies are possible on ~0 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Heat Minor
Hot days Measures: Hot days (>=30C). Observed about 1% of days (0.3 days/month) in April. Historical risk signal only, not a day-by-day forecast.
Likely frequency
0.3 days / month
- Share of days
- ~1% of days
- Upper edge
- Up to ~33°C (P95)
Why this matters
Hot days are possible on ~0 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Travel planning FAQ
Frequently asked questions
Quick answers to the weather questions you ask the most.
Is April a good time to visit San Diego?
Typical April days in San Diego reach highs of 19°C (66°F) with nights around 12°C (54°F). It usually feels mild by day and cool after dark. Overall, April sits in the middle of the San Diego climate range.
What are temperatures like in April?
Daytime temperatures in April typically peak near 19°C (66°F), while nights drop to around 12°C (54°F). Expect mild afternoons and cool evenings.
How much does it rain in April?
Rainfall in April averages 25 mm (0.98 in) across roughly 6 days. Overall it is a moderately wet time of year, so showers are usually brief rather than all-day downpours.
How many hours of daylight are there in April?
You can expect about 13 hours of daylight in April. Sunrise is typically around 05:17 and sunset near 18:18. You get long days with comfortable amounts of daylight.
How strong is the sun in April?
UV levels frequently reach very high levels (around 8), so strong sun protection is essential, especially around midday.
Is it windy in April?
In April, average wind speeds are around 10 km/h (6 mph), with gusts on the windiest days reaching about 42 km/h (26 mph). On the ground, it is it often feels breezy, especially in more exposed spots or along the coast.