Climate Viterbo Airport 2020-2024

Climate and trends: average temperature, flight conditions, precipitation, wind speed and direction.

Calculated from historical METAR data of Viterbo Airport (LIRV) between 2020 and 2024.

VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	81.5	78	76	86	77	87
February	82.7	80	78	87	81	90
March	83.4	77	81	92	86	83
April	86.0		85	86	77	90
May	87.4		82	97	85	96
June	94.6		86	97	98	92
July	96.5		94	98	96	98
August	95.6		94	97	93	93
September	91.6		97	88	96	91
October	86.8		90	87	97	82
November	79.3		80	82	78	85
December	77.0		75	76	82	75
Average	86.8	78.2	85.4	90.6	87.9	89.1

49th best VFR conditions of Italy

VFR conditions during daylight period

Percentage of observations where the VFR minimums for ceiling and visibility are met: visibility of 8 km or more and a ceiling of 3,000 ft or more. Only observations between sunrise and sunset are taken into account.

Marginal VFR conditions (%)

Month	Average	2024	2023	2022	2021	2020
January	95.8	96	93	96	97	97
February	94.7	90	93	96	92	98
March	95.1	91	97	97	96	96
April	96.3		98	97	95	96
May	96.9		95	99	98	100
June	98.2		96	99	98	98
July	98.9		98	100	99	100
August	98.4		98	99	98	97
September	97.4		100	98	99	98
October	94.8		97	93	99	97
November	92.1		95	94	92	91
December	91.5		90	90	96	90
Average	95.8	92.2	95.8	96.9	96.8	96.6

Marginal VFR conditions or better during daylight period

Percentage of observations where the MVFR minimums for ceiling and visibility are met: visibility of 5 km or more and a ceiling of 1,000 ft or more. Only observations between sunrise and sunset are taken into account.

Maximum temperatures (°C)

Month	Average	2024	2023	2022	2021	2020
January	10.5	12	10	11	9	13
February	13.1	15	12	14	14	15
March	14.9	16	15	14	14	14
April	17.7		17	17	17	19
May	21.9		22	26	21	23
June	28.4		27	32	29	26
July	31.7		32	34	31	31
August	31.4		31	31	31	32
September	26.1		28	25	28	26
October	21.7		25	22	20	19
November	15.2		16	15	15	16
December	11.7		13	11	12	12
Average	19.7	14.1	20.6	21.3	19.9	20.4

44th highest temperature of Italy

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°C)

Month	Average	2024	2023	2022	2021	2020
January	3.4	5	4	3	3	4
February	4.6	6	3	4	5	5
March	5.7	8	7	4	4	6
April	7.8		7	7	7	8
May	12.7		13	14	12	13
June	17.4		17	19	17	16
July	19.7		20	21	19	19
August	19.5		18	20	19	20
September	15.8		17	15	17	16
October	12.0		15	13	11	10
November	8.2		9	8	8	8
December	5.2		6	7	5	5
Average	10.5	6.3	11.4	11.2	10.6	10.8

41st lowest temperature of Italy

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	7.2	5	6	5	15	4
February	5.1	9	3	1	5	1
March	5.3	9	4	5	5	4
April	5.2		4	4	7	7
May	5.4		12	1	4	1
June	1.0		1	0	1	3
July	0.7		1	0	1	1
August	1.0		2	1	0	2
September	1.9		1	3	0	3
October	3.2		3	2	3	4
November	8.5		5	8	12	3
December	9.0		1	18	11	11
Average	4.4	7.5	3.7	3.0	4.7	3.4

Precipitation during daylight period

Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.

Wind speed (knots)

Month	Average	2024	2023	2022	2021	2020
January	6.9	9	9	9	9	7
February	7.5	8	7	9	8	8
March	8.1	8	9	9	9	10
April	7.1		9	10	8	9
May	5.5		7	8	10	7
June	5.6		7	9	7	8
July	5.8		7	8	9	8
August	5.7		7	8	8	9
September	5.5		8	8	8	7
October	5.6		9	6	10	8
November	6.0		9	9	9	8
December	6.6		8	9	8	8
Average	6.5	8.3	8.0	8.3	8.6	8.2

44th highest wind speed of Italy

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month	2024	2023	2022	2021	2020
January	057°	044°	045°	093°	043°
February	122°	038°	040°	054°	341°
March	191°	168°	033°	028°	027°
April		020°	345°	049°	024°
May		039°	263°	205°	020°
June		348°	286°	242°	214°
July		231°	275°	225°	346°
August		249°	003°	235°	255°
September		036°	171°	332°	028°
October		193°	047°	048°	197°
November		206°	038°	059°	043°
December		060°	114°	062°	093°

Prevailing wind direction

Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.