Union in Spring
In spring (March, April and May), Union sees average daytime highs around 59°F and overnight lows near 44°F, with 11.5 in of precipitation over about 33 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs climb from about 44°F in early March to 74°F by late May. The sky is clear or mostly clear about 26% of the time across spring, and the air most often feels dry.
Spring is Union's 3rd-best season to visit on our travel score. For the whole year in context, see Union's year-round climate.
- Avg daytime high
- 59°F
- 3rd-warmest season
- Avg overnight low
- 44°F
- Precipitation
- 11.5 in
- 33 wet days
- Avg wind
- 8 mph
- Travel score
- 4.2
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Union in Spring
Over the season highs climb from about 44°F in early March to 74°F by late May.
A typical spring day in Union reaches about 59°F and drops to 44°F overnight. The warmest of the three months is May, the coolest March.
How spring really feels in Union
Once humidity and wind are folded in, spring brings about 0 days that feel above 90°F and 28 that feel at or below 32°F.
The story in spring is cold — wind chill drags the overnight "feels like" below the raw low.
Union 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 | 38° / 25° | 3.4 | 9.2 | 4.6 | 9.4 | 0.0 |
| Feb | 40° / 26° | 3.1 | 8.4 | 3.9 | 10.4 | 0.1 |
| Mar | 48° / 34° | 4.2 | 10.2 | 3.5 | 11.7 | 1.8 |
| Apr | 60° / 44° | 3.7 | 10.8 | 0.4 | 13.1 | 4.6 |
| May | 70° / 54° | 3.6 | 11.7 | 0 | 14.2 | 6.2 |
| Jun | 79° / 64° | 4.1 | 11.2 | 0 | 14.9 | 6.4 |
| Jul | 84° / 69° | 4.2 | 11 | 0 | 14.6 | 5.4 |
| Aug | 82° / 68° | 4.0 | 10.7 | 0 | 13.6 | 6.1 |
| Sep | 75° / 60° | 4.0 | 9.4 | 0 | 12.3 | 6.9 |
| Oct | 64° / 49° | 3.9 | 8.7 | 0.1 | 10.9 | 5.8 |
| Nov | 52° / 39° | 3.1 | 8.2 | 0.5 | 9.7 | 3.0 |
| Dec | 43° / 31° | 4.0 | 9.7 | 3 | 9.1 | 0.5 |
Cloud cover in Spring
The sky is clear or mostly clear about 26% of the time across spring.
Chance of precipitation in Spring
Union gets around 11.5 in of rain and snow over 33 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 8 mph across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 hours in early March to 14 h 42 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 4.8 kWh/m².
Hazard calendar for Union
None of Union's seasonal hazards peak in spring. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Union sits in the Atlantic hurricane belt; the season peaks August–October.
Is spring a good time to visit Union?
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 a reasonable time to visit Union for sightseeing.
What to pack for Union in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Union sees daytime highs around 59°F and nights near 44°F. Pack a warm layer. Worth having: rain gear and sun protection. About 33 days see rain.
Sea temperature near Union in Spring
The nearest coast averages about 47°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 21 mi away) is warmest in August at about 74°F and coldest in February near 40°F.
It's comfortable for a long swim from Jun 30 to Sep 26 — about 2.9 months when the water holds above 68°F.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 43 | 40 | 41 | 46 | 55 | 65 | 72 | 74 | 71 | 63 | 55 | 48 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Refreshing | Refreshing | Cool | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 43 | Bracing |
| Feb | 40 | Bracing |
| Mar | 41 | Bracing |
| Apr | 46 | Bracing |
| May | 55 | Bracing |
| Jun | 65 | Cool |
| Jul | 72 | Refreshing |
| Aug | 74 | Refreshing |
| Sep | 71 | Refreshing |
| Oct | 63 | Cool |
| Nov | 55 | Bracing |
| Dec | 48 | Bracing |
UV index in Union in Spring
Clear-sky midday UV across spring averages around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Union peaks around July 11 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 22 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 5 | 6 | 7 | 8 | 8 | 6 | 6 | 3 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | Very high | Very high | Very high | High | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 5 | Moderate |
| Apr | 6 | High |
| May | 7 | Very high |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 6 | High |
| Sep | 6 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Moderate |
| Dec | 1 | Low |
Air quality in Union 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 Union is worst in July — around 18 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (November, 10 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) | 12 | 15 | 16 | 16 | 17 | 17 | 18 | 16 | 14 | 11 | 10 | 12 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 12 | Moderate |
| Feb | 15 | Moderate |
| Mar | 16 | Moderate |
| Apr | 16 | Moderate |
| May | 17 | Moderate |
| Jun | 17 | Moderate |
| Jul | 18 | Moderate |
| Aug | 16 | Moderate |
| Sep | 14 | Moderate |
| Oct | 11 | Good |
| Nov | 10 | Good |
| Dec | 12 | Good |
Where is Union?
Union sits at 40.7°N, 74.3°W, 98 ft above sea level, in United States. The nearest listed city is Hillside, 1.9 mi away.
Topography around Union
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Union.
Within 2 miles, the terrain around Union has only modest variations in elevation — a maximum elevation change of 262 ft around an average of 115 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 764 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,008 ft.
The land around Union is covered by artificial surfaces (54%) and trees (38%) within 2 miles, trees (49%) and artificial surfaces (37%) within 10 miles, and trees (58%) and water (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 Union (40.6976°, -74.2632°, elevation 98 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.