Boom in Spring
In spring (March, April and May), Boom sees average daytime highs around 14°C and overnight lows near 6°C, with 159 mm of precipitation over about 35 wet days across the season. It is the 3rd-warmest season and the driest season of the year.
Over the season highs climb from about 9°C in early March to 19°C by late May. The sky is clear or mostly clear about 18% of the time across spring, and the air most often feels dry.
Spring is Boom's 3rd-best season to visit on our travel score. For the whole year in context, see Boom's year-round climate.
- Avg daytime high
- 14°C
- 3rd-warmest season
- Avg overnight low
- 6°C
- Precipitation
- 159 mm
- 35 wet days
- Avg wind
- 13 km/h
- Travel score
- 3.9
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Boom in Spring
Over the season highs climb from about 9°C in early March to 19°C by late May.
A typical spring day in Boom reaches about 14°C and drops to 6°C overnight. The warmest of the three months is May, the coolest March.
How spring really feels in Boom
Once humidity and wind are folded in, spring brings about 0 days that feel above 32°C and 10 that feel at or below 0°C.
The story in spring is cold — wind chill drags the overnight "feels like" below the raw low.
Boom 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 (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 6° / 2° | 61 | 11.6 | 0.9 | 8.2 | 0.5 |
| Feb | 7° / 2° | 55 | 11.1 | 1.4 | 9.6 | 0.8 |
| Mar | 11° / 4° | 53 | 11.3 | 0.8 | 11.5 | 2.4 |
| Apr | 14° / 6° | 46 | 11.4 | 0 | 13.5 | 4.0 |
| May | 18° / 9° | 60 | 11.9 | 0 | 15.3 | 5.4 |
| Jun | 21° / 12° | 64 | 11.1 | 0 | 16.2 | 6.0 |
| Jul | 23° / 14° | 70 | 12.2 | 0 | 15.9 | 6.4 |
| Aug | 22° / 14° | 74 | 11.9 | 0 | 14.4 | 6.4 |
| Sep | 19° / 12° | 54 | 10.3 | 0 | 12.4 | 5.9 |
| Oct | 15° / 9° | 58 | 11 | 0 | 10.4 | 4.2 |
| Nov | 10° / 5° | 62 | 11.8 | 0.3 | 8.7 | 2.0 |
| Dec | 7° / 3° | 71 | 12.9 | 1.1 | 7.8 | 0.7 |
Cloud cover in Spring
The sky is clear or mostly clear about 18% of the time across spring.
Chance of precipitation in Spring
Boom gets around 159 mm of rain and snow over 35 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 13 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 10 h 30 min in early March to 15 h 54 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 4.0 kWh/m².
Is spring a good time to visit Boom?
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 weaker month for outdoor sightseeing in Boom.
What to pack for Boom in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Boom sees daytime highs around 14°C and nights near 6°C. Pack a warm layer. Worth having: rain gear and sun protection. About 35 days see rain.
UV index in Boom in Spring
Clear-sky midday UV across spring averages around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Boom peaks around June 23 at about 6 (high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 1 | 3 | 4 | 6 | 6 | 6 | 6 | 4 | 2 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | High | High | High | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 1 | Low |
| Mar | 3 | Moderate |
| Apr | 4 | Moderate |
| May | 6 | High |
| Jun | 6 | High |
| Jul | 6 | High |
| Aug | 6 | High |
| Sep | 4 | Moderate |
| Oct | 2 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Where is Boom?
Boom sits at 51.1°N, 4.4°E, 10 m above sea level, in Belgium. The nearest listed city is Willebroek, 4.0 km away.
Topography around Boom
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Boom.
Within 3 km, the terrain around Boom has only modest variations in elevation — a maximum elevation change of 45 m around an average of 10 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 73 m; within 80 km, significant variations in elevation — a maximum elevation change of 341 m.
The land around Boom is covered by trees (33%), artificial surfaces (32%) and grassland (21%) within 3 km, grassland (30%), trees (27%) and artificial surfaces (24%) within 16 km, and cropland (35%), trees (24%) and grassland (24%) within 80 km.
Belgium travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / E
- 230 V · 50 Hz
- Prices
- ≈ 81% of US
- price level, 2025
- GDP per capita
- $60,750
- 2025
- Happiness
- 6.9 / 10
- World Happiness, 2025
- Safe drinking water
- 100%
- of population, 2024
- Homicide rate
- 1.1
- per 100k, 2021
- Road deaths
- 5.8
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very high
- EF EPI 608
- 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 Boom (51.0924°, 4.3717°, elevation 10 m), 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.