Petrich weather in May

In May, Petrich sees average daytime highs of 21°C and overnight lows near 10°C, with 78 mm of precipitation across 12.5 wet days and about 14.3 hours of daylight. It is the 5th-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 19°C in the first days to 23°C by the end. The sky is clear or mostly clear about 37% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 48 min at the start of May to 14 h 42 min by month's end. Set against the rest of the year, May is Petrich's 7th-clearest and 4th-windiest month. For the whole year in context, see Petrich's year-round climate.

Daytime high
21°
5th warmest
Overnight low
10°
8th coldest
Precipitation
78 mm
12.5 wet days
Daylight
14 h 18 min
5:14 AM – 7:33 PM
Cloud cover
53%
7th clearest
Wind
5 km/h
4th windiest
Solar energy
5.91 kWh/m²
Travel score
6.2
out of 10

Petrich is city in Petrich municipality, Blagoevgrad oblast, Bulgaria.

Density
382/km²
people per km²

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 19°C in the first days to 23°C by the end.

A typical May day in Petrich reaches about 21°C in the afternoon and slips back to 10°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 26°C. Set against its neighbours, May runs about 5°C warmer than April and about 5°C cooler than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
1199
2199
3199
4209
5209
6209
7209
82010
92010
102010
112110
122110
132110
142110
152110
162111
172111
182111
192111
202211
212211
222211
232211
242211
252211
262212
272212
282212
292312
302312
312312

How May really feels in Petrich

Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Petrich weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°588.14.29.40.4
Feb / -1°599.24.210.31.3
Mar12° / 7410.82.911.73.1
Apr16° / 6911.90.513.14.9
May21° / 10°7812.50.114.36.2
Jun26° / 14°5310.6014.96.9
Jul28° / 16°407.8014.76.8
Aug28° / 16°336.8013.76.8
Sep24° / 13°407012.37.7
Oct18° / 637.40.210.96.3
Nov12° / 6881.19.73.3
Dec / -1°789.53.19.10.8

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 22% of May, with mostly cloudy or overcast conditions the remaining 42%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25545
35545
45545
55545
65644
75644
85545
95545
105644
115644
125644
135644
145743
155842
165842
175842
185842
195842
205842
215941
225941
235941
246040
256139
266238
276337
286337
296436
306436
316634

Chance of precipitation in May

Any precipitation

Petrich gets around 78 mm of rain and snow over 12.5 wet days in May, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 40% and peaks near 42% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202531
Rain chance (%)
139
239
339
439
539
639
739
840
940
1040
1140
1240
1341
1441
1541
1641
1742
1842
1942
2042
2142
2241
2341
2441
2541
2640
2740
2840
2940
3040
3140

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the dry band about 91% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19910
29910
39910
49820
59820
69730
79730
89640
99640
109550
119460
129370
139370
149280
159190
169190
1790100
1890100
1989110
2089110
2189110
2288120
2388120
2487130
2586140
2685150
2784160
2882171
2981181
3079201
3178211

Wind in May

Winds average 5 km/h in May.

Across May, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 48 min at the start of May to 14 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over May. Sunrise moves from 5:32 AM to 5:02 AM, and sunset from 7:17 PM to 7:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.85:327:17
213.85:307:18
313.85:297:19
413.95:287:20
513.95:267:21
614.05:257:23
714.05:247:24
814.05:237:25
914.15:217:26
1014.15:207:27
1114.15:197:28
1214.25:187:29
1314.25:177:30
1414.35:167:31
1514.35:157:32
1614.35:147:33
1714.45:137:34
1814.45:127:35
1914.45:117:36
2014.45:107:37
2114.55:097:38
2214.55:087:39
2314.55:087:40
2414.65:077:41
2514.65:067:42
2614.65:057:42
2714.65:057:43
2814.75:047:44
2914.75:047:45
3014.75:037:46
3114.75:027:47

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.91 kWh/m².

For context, solar energy here swings from a low near 1.67 kWh/m² to a high of 6.59 kWh/m² in June across the year — May's 5.91 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
185.9Bright
195.9Bright
206.0Bright
216.0Bright
226.0Intense
236.0Intense
246.0Intense
256.1Intense
266.1Intense
276.1Intense
286.1Intense
296.2Intense
306.2Intense
316.2Intense
Planning a trip in May

Is May a good time to visit Petrich?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.2
Sightseeing
6th-best month of the year
3.8
Beach & pool
5th-best month of the year

May is a reasonable time to visit Petrich for sightseeing.

What to pack for Petrich in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, Petrich sees daytime highs around 21°C and nights near 10°C. Worth packing: rain gear and sun protection. About 13 days see rain.

rain gearsun protection

UV index in Petrich in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks 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 Petrich peaks around June 22 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 22UV 9Dec 21UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr8Very high
May6High
Jun9Very high
Jul9Very high
Aug9Very high
Sep6High
Oct4Moderate
Nov2Moderate
Dec1Low

Air quality in Petrich in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Petrich is worst in March — around 15 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (December, 9 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 2215 µg/m³Dec 1410 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb13Moderate
Mar15Moderate
Apr15Moderate
May14Moderate
Jun14Moderate
Jul12Moderate
Aug13Moderate
Sep11Good
Oct10Good
Nov11Good
Dec9Good
Location & terrain

Where is Petrich?

Petrich sits at 41.4°N, 23.2°E, 185 m above sea level, in Bulgaria. The nearest listed city is Sandanski, 20 km away.

SérresStrumicaGotse DelchevKilkísBanskoGevgelijaRadovis

Topography around Petrich

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

Within 3 km, the terrain around Petrich has large variations in elevation — a maximum elevation change of 684 m around an average of 234 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,986 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,873 m.

The land around Petrich is covered by trees (40%) and cropland (31%) within 3 km, trees (58%) and grassland (25%) within 16 km, and trees (57%) and cropland (20%) within 80 km.

3 km
684 m
16 km
1,986 m
80 km
2,873 m
treesshrubsgrasslandcroplandartificial surfaceswater
May weather nearby: Sandanski 20 km · Sérres 45 km · Strumica 47 km · Gotse Delchev 48 km · Kilkís 53 km · Bansko 54 km · Gevgelija 65 km · Radovis 67 km

Bulgaria travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 23% of US
price level, 2025
GDP per capita
$20,328
2025
Happiness
5.7 / 10
World Happiness, 2025
Safe drinking water
96%
of population, 2024
Homicide rate
1.1
per 100k, 2023
Road deaths
9.2
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 594
Religion
Christian 65%Muslim 10%none 5%other 0%

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 Petrich (41.3985°, 23.207°, elevation 185 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. 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).