Statistics TT Circuit Assen Helipad 2019-2023

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

Calculated from historical METAR data of Groningen Airport Eelde (EHGG) between 2019 and 2023.

VFR conditions (%)

Month	Average	2023	2022	2021	2020	2019
January	36.8	34	31	47	27	39
February	50.3	43	54	58	44	54
March	60.9	54	78	51	70	54
April	76.0	70	76	72	88	80
May	76.9	74	82	63	87	75
June	74.7	84	86	67	75	78
July	76.7	79	80	65	73	75
August	80.1	73	88	66	82	85
September	73.4		83	62	69	73
October	63.5		68	66	57	58
November	50.1		57	40	60	40
December	35.3		34	35	27	53
Average	67.0	67.6	73.0	59.8	67.4	67.0

15th best VFR conditions of Netherlands

VFR conditions during daylight period

Percentage of observations where the VFR minimums for ceiling and visibility are met:

• Visibility: 8 km or more
• Ceiling: 3,000 ft or more

Only observations between sunrise and sunset are taken into account.

Marginal VFR conditions (%)

Month	Average	2023	2022	2021	2020	2019
January	70.0	80	71	72	60	65
February	81.5	84	87	76	91	74
March	87.3	88	89	90	96	85
April	93.4	89	96	96	96	94
May	94.0	92	96	93	98	91
June	92.6	96	97	85	90	94
July	93.1	94	96	87	90	96
August	94.6	93	96	92	94	95
September	89.1		93	87	83	90
October	86.6		89	83	86	86
November	74.0		80	67	78	71
December	62.4		60	59	56	83
Average	87.7	90.2	90.5	84.5	87.1	87.4

Marginal VFR conditions or better during daylight period

Percentage of observations where the MVFR minimums for ceiling and visibility are met:

• Visibility: 5 km or more
• Ceiling: 1,000 ft or more

Only observations between sunrise and sunset are taken into account.

Maximum temperatures (°C)

Month	Average	2023	2022	2021	2020	2019
January	6.0	7	7	5	8	5
February	7.3	9	9	6	9	10
March	10.0	10	12	10	10	11
April	13.4	13	13	10	16	15
May	17.5	17	18	14	17	16
June	21.9	24	21	22	22	23
July	22.4	22	23	22	20	23
August	23.0	22	25	20	25	24
September	19.0		19	20	20	18
October	15.1		16	15	14	14
November	9.6		10	10	11	9
December	6.5		3	7	7	8
Average	14.5	15.3	15.1	13.3	14.8	14.5

12th highest temperature of Netherlands

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°C)

Month	Average	2023	2022	2021	2020	2019
January	1.1	3	3	0	3	0
February	0.9	1	2	-1	4	2
March	1.8	3	0	2	2	4
April	3.2	3	4	0	4	5
May	7.0	8	7	6	5	6
June	11.4	12	10	11	12	12
July	12.0	12	11	13	10	13
August	12.4	12	12	13	14	13
September	9.2		9	11	9	9
October	7.9		9	8	8	8
November	3.8		5	5	5	3
December	2.0		-2	1	3	3
Average	6.1	6.5	5.9	5.7	6.4	6.3

2nd lowest temperature of Netherlands

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month	Average	2023	2022	2021	2020	2019
January	24.9	23	15	26	26	37
February	21.3	14	33	16	41	15
March	17.8	28	7	18	16	29
April	14.2	19	16	21	6	11
May	12.5	8	11	34	9	13
June	11.9	5	12	7	19	8
July	14.8	22	10	16	24	12
August	14.9	22	2	20	18	16
September	20.4		28	10	12	28
October	25.4		20	26	30	31
November	23.5		19	23	19	27
December	24.8		20	20	24	21
Average	17.4	17.0	14.8	19.2	19.2	18.9

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	2023	2022	2021	2020	2019
January	9.7	11	10	8	10	10
February	10.7	9	14	9	14	9
March	10.1	11	7	10	11	12
April	9.0	9	10	9	9	9
May	8.1	8	8	9	8	9
June	7.6	8	7	7	7	8
July	7.7	9	8	7	8	8
August	7.5	7	7	8	7	8
September	7.5		7	6	7	8
October	9.1		9	9	9	9
November	8.5		10	8	9	8
December	8.7		7	8	8	9
Average	8.5	8.9	8.3	8.1	8.7	8.8

12th highest wind speed of Netherlands

Average wind speed

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

Prevailing wind direction

Month	2023	2022	2021	2020	2019
January	229°	254°	224°	220°	278°
February	267°	239°	140°	229°	222°
March	239°	081°	258°	220°	254°
April	063°	013°	335°	035°	081°
May	016°	268°	247°	325°	302°
June	011°	267°	335°	222°	221°
July	236°	277°	271°	249°	282°
August	245°	358°	275°	208°	226°
September		251°	216°	212°	238°
October		209°	208°	195°	200°
November		187°	225°	205°	173°
December		152°	209°	184°	212°

Prevailing wind direction

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