Glendora in Spring
In spring (March, April and May), Glendora sees average daytime highs around 67°F and overnight lows near 48°F, with 4.0 in of precipitation over about 15 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs climb from about 59°F in early March to 75°F by late May. The sky is clear or mostly clear about 55% of the time across spring, and the air most often feels dry.
Spring is Glendora's 2nd-best season to visit on our travel score. For the whole year in context, see Glendora's year-round climate.
- Avg daytime high
- 67°F
- 3rd-warmest season
- Avg overnight low
- 48°F
- Precipitation
- 4.0 in
- 15 wet days
- Avg wind
- 4 mph
- Travel score
- 7.2
- 2nd-best season
- Months
- Mar · Apr · May
Temperature in Glendora in Spring
Over the season highs climb from about 59°F in early March to 75°F by late May.
A typical spring day in Glendora reaches about 67°F and drops to 48°F overnight. The warmest of the three months is May, the coolest March.
Glendora weather by month
How the three spring months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 58° / 41° | 3.6 | 6 | 1.6 | 10 | 4.7 |
| Feb | 58° / 42° | 3.9 | 7 | 2.1 | 10.7 | 4.7 |
| Mar | 62° / 44° | 2.4 | 6.9 | 1.2 | 11.7 | 5.9 |
| Apr | 67° / 47° | 1.1 | 4.3 | 0.6 | 12.8 | 7.3 |
| May | 73° / 52° | 0.5 | 3.3 | 0 | 13.8 | 8.3 |
| Jun | 80° / 58° | 0.2 | 0.9 | 0 | 14.2 | 8.6 |
| Jul | 86° / 63° | 0.4 | 2.6 | 0 | 14 | 6.6 |
| Aug | 87° / 64° | 0.3 | 2.3 | 0 | 13.3 | 6.2 |
| Sep | 83° / 61° | 0.3 | 2 | 0 | 12.2 | 7.8 |
| Oct | 74° / 54° | 0.8 | 2.7 | 0 | 11.1 | 8.7 |
| Nov | 65° / 47° | 0.9 | 3 | 0.4 | 10.2 | 7.2 |
| Dec | 57° / 41° | 2.4 | 5.3 | 0.9 | 9.8 | 4.7 |
Cloud cover in Spring
The sky is clear or mostly clear about 55% of the time across spring.
Chance of precipitation in Spring
Glendora gets around 4.0 in of rain and snow over 15 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 4 mph across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 12 min in early March to 14 h 06 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 6.6 kWh/m².
Is spring a good time to visit Glendora?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is one of the better times to visit Glendora for general sightseeing.
What to pack for Glendora in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Glendora sees daytime highs around 67°F and nights near 48°F. Pack sun protection. Worth having: light clothes and a warm layer. About 15 days see rain.
Sea temperature near Glendora in Spring
The nearest coast averages about 60°F across spring — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 34 mi away) is warmest in August at about 68°F and coldest in February near 59°F.
It's comfortable for a long swim from Aug 4 to Sep 13 — about 1.3 months when the water holds above 68°F.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 59 | 59 | 59 | 59 | 62 | 65 | 67 | 68 | 68 | 66 | 63 | 60 |
| Comfort | Bracing | Bracing | Bracing | Cool | Cool | Cool | Cool | Refreshing | Refreshing | Cool | Cool | Cool |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 59 | Bracing |
| Feb | 59 | Bracing |
| Mar | 59 | Bracing |
| Apr | 59 | Cool |
| May | 62 | Cool |
| Jun | 65 | Cool |
| Jul | 67 | Cool |
| Aug | 68 | Refreshing |
| Sep | 68 | Refreshing |
| Oct | 66 | Cool |
| Nov | 63 | Cool |
| Dec | 60 | Cool |
UV index in Glendora in Spring
Clear-sky midday UV across spring averages around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Glendora peaks around July 11 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 4 | 5 | 5 | 8 | 8 | 11 | 11 | 10 | 8 | 6 | 3 | 3 |
| Level | Moderate | Moderate | Moderate | Very high | Very high | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 5 | Moderate |
| Mar | 5 | Moderate |
| Apr | 8 | Very high |
| May | 8 | Very high |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 10 | Extreme |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 3 | Moderate |
| Dec | 3 | Moderate |
Air quality in Glendora in Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.
Air quality in Glendora is worst in September — around 39 µg/m³ PM2.5 (poor), about 3.2× the cleanest month (May, 12 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 14 | 15 | 16 | 14 | 12 | 15 | 18 | 22 | 39 | 15 | 17 | 14 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Poor | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 14 | Moderate |
| Feb | 15 | Moderate |
| Mar | 16 | Moderate |
| Apr | 14 | Moderate |
| May | 12 | Moderate |
| Jun | 15 | Moderate |
| Jul | 18 | Moderate |
| Aug | 22 | Moderate |
| Sep | 39 | Poor |
| Oct | 15 | Moderate |
| Nov | 17 | Moderate |
| Dec | 14 | Moderate |
Where is Glendora?
Glendora sits at 34.1°N, 117.9°W, 774 ft above sea level, in United States. The nearest listed city is Azusa, 2.5 mi away.
Topography around Glendora
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Glendora.
Within 2 miles, the terrain around Glendora has large variations in elevation — a maximum elevation change of 2,031 ft around an average of 938 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 5,164 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 10,013 ft.
The land around Glendora is covered by artificial surfaces (61%) and trees (20%) within 2 miles, artificial surfaces (41%), shrubs (28%) and trees (23%) within 10 miles, and artificial surfaces (26%) and grassland (20%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Glendora (34.1361°, -117.8653°, elevation 774 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.