Climate and average weather in Monfalcone

In Monfalcone, the summers are warm, fairly dry, and mostly clear and the winters are cold, snowy, and partly cloudy.

Best: mid May to late September

Over the course of the year, the temperature in Monfalcone typically varies from 5°C to 26°C, and is rarely below 1°C or above 30°C. August is the hottest month of the year, while January is the coldest.

Based on the travel score, the best time of year to visit Monfalcone for warm-weather activities is from mid May to late September.

Hottest
Aug
26°
Coldest
Jan
Wettest
Nov
201 mm
Driest
Jul
63 mm
Rain / yr
1409 mm
119 wet days
Daylight
8.5–15.5 h
shortest–longest
Elevation
7 m
45.8°N
Clearest
Aug
39% cloud

Monfalcone is chief town of the homonym municipality.

Air quality
Moderate
PM2.5 12.3 µg/m³ · 2019

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Monfalcone weather by month, at a glance

The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.

Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around mid May to late September.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

Daily average highs and lows in Monfalcone, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.

The hot season lasts 3.4 months, from June 4 to September 15, with daily high temperatures above 22°C. The hottest month of the year in Monfalcone is August, with an average high of 26°C and low of 22°C.

The cool season lasts 3.8 months, from November 23 to March 18, with daily high temperatures below 11°C. The coldest month of the year in Monfalcone is January, with an average low of 5°C and high of 8°C.

Days typically run about 4°C warmer than nights year-round.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan85
Feb85
Mar117
Apr1511
May1915
Jun2419
Jul2621
Aug2622
Sep2218
Oct1814
Nov1310
Dec96

Average hourly temperature in Monfalcone

A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on August afternoons, near 26°C, and coldest before dawn in January, near C.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM

Monfalcone weather by month

Every month at a glance. Click a month for its detailed page.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 919.60.68.91.3
Feb / 918.4110.11.6
Mar11° / 9390.411.63.0
Apr15° / 11°9710.50.113.34.4
May19° / 15°10510.6014.76.2
Jun24° / 19°879.4015.57.2
Jul26° / 21°637.2015.27.5
Aug26° / 22°907.4013.97.4
Sep22° / 18°17010.4012.36.8
Oct18° / 14°19512.6010.75.4
Nov13° / 10°20113.40.39.33.3
Dec / 12710.30.88.51.8

Chance of rain

How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.

Monfalcone gets about 1409 mm of precipitation a year. On a typical day the chance of rain is often wet, but that rises and falls sharply with the seasons.

The wetter season lasts 4.1 months, from around Sep 8 to Jan 11, peaking in November at about 46% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 25.

November is the wettest month by volume, with 201 mm over about 13 wet days; July is the driest, with 63 mm.

0%10%20%30%40%50%60%JanFebMarAprMayJunJulAugSepOctNovDecdrierwettermostly drysome rainoften wetvery wetNov 10 · 46%Jul 25 · 20%
Rain on a day (%)Rain days
Jan3110
Feb308
Mar289
Apr3511
May3511
Jun319
Jul237
Aug247
Sep3510
Oct4013
Nov4313
Dec3410

Monthly rainfall

Over a full year, Monfalcone collects about 1409 mm of rain across 119 wet days — roughly 117 mm in an average month.

It doesn’t fall evenly. November is the wettest month with 201 mm, while July is the driest at just 63 mm. The three wettest months alone bring about 40% of the year’s total, and some of the cold-season precipitation falls as snow.

050100150200250JanFebMarAprMayJunJulAugSepOctNovDec91919397105876390170195201127
Rainfall (mm)Rain daysSnow days
Jan91101
Feb9181
Mar9390
Apr97110
May105110
Jun8790
Jul6370
Aug9070
Sep170100
Oct195130
Nov201130
Dec127101

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

How often the daytime sky is clear, partly cloudy or overcast.

In Monfalcone, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.

The clearer part of the year begins around May 16 and lasts for 4.3 months, ending around September 24. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 75% of the time on average.

The cloudier part of the year begins around September 25 and lasts for 5.6 months, ending around March 12. The cloudiest month is November, when it is overcast or mostly cloudy 59% of the time.

0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JanFebMarAprMayJunJulAugSepOctNovDecAug 12 · 77%Nov 18 · 40%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan4654
Feb4951
Mar5545
Apr5446
May5743
Jun6733
Jul7525
Aug7426
Sep6238
Oct5149
Nov4159
Dec4555

Daylight, sunrise and sunset

DaylightNight

Hours of daylight through the year, with sunrise and sunset times.

The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around June 12, brings about 15 h 30 min of light; the shortest, around January 1, only 8 h 30 min — a swing of roughly 7 hours.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan8.97:504:41
Feb10.17:195:22
Mar11.66:286:04
Apr13.35:276:45
May14.74:417:24
Jun15.54:217:51
Jul15.24:367:47
Aug13.95:117:09
Sep12.35:516:10
Oct10.76:315:11
Nov9.37:144:28
Dec8.57:474:17

Sunny days

How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.

Monfalcone averages about 13 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 9 and 18 days.

The sunnier stretch runs 4.2 months, from around May 20 to Sep 23. The sunniest month is August, with roughly 17 sunny days (bright).

The greyest month is November, down near 9 sunny days — about 48% fewer than the August peak.

0510152025JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightbrilliantAug 1018 daysNov 129 days
Sunny daysSky
Jan11Mixed
Feb11Mixed
Mar12Mixed
Apr11Mixed
May12Mixed
Jun14Mixed
Jul17Bright
Aug18Bright
Sep14Mixed
Oct11Mixed
Nov9Mixed
Dec11Mixed

Humidity comfort

DryComfortableHumidMuggyOppressiveMiserable

Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.

Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.

In Monfalcone, how humid it feels changes dramatically over the year.

The more humid part of the year lasts 4.4 months, from around May 23 to October 2. The muggiest month is August, when the air feels humid, muggy or worse about 78% of the time.

The most comfortable stretch runs from around October 3 to May 22, and April is the most comfortable month — the air is dry or comfortable 100% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecApr 16 · 100%Aug 2 · 15%oppressivecomfortablemuggyhumiddrycomfortablehumidcomfortable
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
Jan1000000
Feb1000000
Mar1000000
Apr946000
May48351430
Jun162333245
Jul714293812
Aug715283712
Sep332629121
Oct65231200
Nov927100
Dec1000000

Wind

Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.

This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.

Across the year, average wind speed in Monfalcone is typically calm, near 12 km/h, and varies little with the seasons.

The windier part of the year lasts 6.5 months, from around Sep 22 to Apr 8. The windiest month is December, averaging about 13 km/h (light breeze).

The calmer part of the year runs from around Apr 9 to Sep 21, with June the calmest month at about 10 km/h.

05101520JanFebMarAprMayJunJulAugSepOctNovDecwindiercalmerwindiercalmlight breezeDec 2 · 14 km/hJun 4 · 10 km/h
Wind speed (km/h)Feels
Jan13light breeze
Feb13light breeze
Mar12light breeze
Apr11calm
May10calm
Jun10calm
Jul10calm
Aug10calm
Sep12calm
Oct13light breeze
Nov13light breeze
Dec13light breeze

Best time to visit Monfalcone

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in Monfalcone throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around late September, Monfalcone is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.

Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.

The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Monfalcone for general outdoor tourist activities is from mid May to late September, with a peak score in the third week of July.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationJul 21 · 7.6

The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Travel score (0–10)Rating
Jan1.3poor
Feb1.6poor
Mar3.0poor
Apr4.5fair
May6.2good
Jun7.2good
Jul7.5good
Aug7.4good
Sep6.7good
Oct5.4fair
Nov3.3poor
Dec1.8poor

The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Monfalcone for hot-weather activities is from mid June to early September, with a peak score in the last week of July.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationJul 29 · 7.4

The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

What to pack for Monfalcone, by month

EssentialRecommendedOptional

Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.

For a warm-season trip around August (highs near 26°C), the essentials are light clothes and sun protection. In the cold season around January (highs near 8°C), pack a warm layer, a heavy coat and rain gear.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In August, Monfalcone sees daytime highs around 26°C and nights near 22°C. Worth packing: light clothes and sun protection. About 7 days see rain.

Sea temperature near Monfalcone

Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.

The sea at the nearest coast (about 21 km away) is warmest in August at about 25°C and coldest in February near 10°C.

It's comfortable for a long swim from May 31 to Oct 9 — about 4.3 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan11Bracing
Feb10Bracing
Mar10Bracing
Apr13Bracing
May18Cool
Jun23Refreshing
Jul25Warm
Aug25Warm
Sep23Refreshing
Oct19Cool
Nov16Cool
Dec13Bracing

UV index (midday) in Monfalcone by month

LowModerateHighVery highExtreme

Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.

Under clear skies, the midday UV index in Monfalcone peaks around July 15 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 15UV 8Jan 10UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr7High
May6High
Jun8Very high
Jul8Very high
Aug7Very high
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low

Average hourly UV index in Monfalcone

LowModerateHighVery highExtreme

Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.

The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

UV falls off far faster than brightness as the sun drops, so even in July the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM
UV ≥ 3 (h/day)UV ≥ 6 (h/day)
Jan00
Feb00
Mar40
Apr6.52.5
May7.52.5
Jun84
Jul8.55
Aug73.5
Sep5.50
Oct00
Nov00
Dec00

Air quality in Monfalcone by month

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see which months the air is worst, not just the yearly average.

Air quality in Monfalcone is worst in January — around 16 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (September, 9 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Monfalcone's WHO annual average of 12.3 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateJan 1816 µg/m³Sep 149 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb14Moderate
Mar15Moderate
Apr14Moderate
May12Good
Jun12Good
Jul12Good
Aug10Good
Sep9Good
Oct10Good
Nov10Good
Dec13Moderate
Almanac & agriculture

Growing season

Chance of a frost-free day

Monfalcone is mild enough that a frost-free day stays more likely than not even in midwinter.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDec
Frost-free chance (%)Frost nights
Jan960
Feb960
Mar1000
Apr1000
May1000
Jun1000
Jul1000
Aug1000
Sep1000
Oct1000
Nov1000
Dec980

Growing degree days

Degree days (base 10°C)

Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Monfalcone banks about 2,011 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around August.

05001,0001,5002,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan0
Feb0
Mar2
Apr79
May225
Jun341
Jul424
Aug427
Sep298
Oct175
Nov42
Dec0

Solar energy

Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.

Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.

Monfalcone receives about 3.8 kWh/m² a day of solar energy on average — moderate — with a clear seasonal swing between 1.1 and 6.4 kWh/m².

The brighter stretch of the year lasts 6.0 months, from around Mar 21 to Sep 18. The brightest month is June, averaging about 6.3 kWh/m² (intense).

The dimmest month is December, down near 1.2 kWh/m² — roughly 81% less than the June peak.

012345678JanFebMarAprMayJunJulAugSepOctNovDecdimmerbrighterdimmerdimmoderatebrightintenseJun 306.4 kWhDec 211.1 kWh
Solar energy (kWh/m²)Level
Jan1.4Dim
Feb2.3Moderate
Mar3.5Moderate
Apr4.8Bright
May5.7Bright
Jun6.3Intense
Jul6.3Intense
Aug5.5Bright
Sep4.0Moderate
Oct2.5Moderate
Nov1.5Dim
Dec1.2Dim

Where is Monfalcone?

Monfalcone sits at 45.8°N, 13.5°E, 7 m above sea level, in Italy. The nearest listed city is Gorizia, 17 km away.

Topography around Monfalcone

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Monfalcone.

Within 3 km, the terrain around Monfalcone has only modest variations in elevation — a maximum elevation change of 140 m around an average of 20 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 642 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,763 m.

The land around Monfalcone is covered by trees (40%) and artificial surfaces (30%) within 3 km, trees (34%), water (23%) and cropland (21%) within 16 km, and trees (50%) within 80 km.

3 km
140 m
16 km
642 m
80 km
2,763 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
Nearby: Gorizia 17 km · Nova Gorica 19 km · Trieste 26 km · Piran 31 km · Koper 32 km · Divača 36 km · Udine 37 km · Postojna 53 km

Italy travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F / L
230 V · 50 Hz
Prices
≈ 69% of US
price level, 2025
GDP per capita
$43,309
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
0.6
per 100k, 2023
Road deaths
5.3
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 513
Religion
Christian 81%unaffiliated 13%Muslim 5%other 1%

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 Monfalcone (45.8046°, 13.5329°, elevation 7 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).