Cool and Damp
Temperatures
The average maximum temperature during September 2022 in Horsholm was 17.4 Celsius, and that was over a degree below normal for the time of year. The average minimum temperature was 9.3 Celsius, and that was around half a degree below the monthly normal.
The highest temperature recorded during the month was 21.3 Celsius on the 7th, but the 2nd and 5th both had highs of 21.2 Celsius, and 21.0 Celsius was recorded on the 1st. The only other day when the temperature rose above 20 Celsius was on the 4th when 20.9 Celsius occurred. All of the first 10 days of September had maxima above 19 Celsius, but after the 10th, the only day with a high above 19 Celsius was the 12th with a maximum of 19.2 Celsius. On many days after the 10th (10), the temperature rose to between 16 and 18 Celsius, but some cooler days occurred, especially during the last week of the month. On 6 days the temperature failed to rise above 15 Celsius. One of those days was the 18th, with a maximum of 14.6 Celsius, the other 5 days were cooler and they all occurred at the end of the month. On 2 of the days, the temperature stayed below 13 Celsius. The maximum on the 27th was 12.7 Celsius, with 12.1 Celsius recorded on the 28th.
There were several mild nights during September, with some of the highest temperatures occurring during the early part of the month. On the 10th, a minimum of 14.2 Celsius was recorded, and 14.0 Celsius occurred on the 8th. A further 4 nights had minima above 13 Celsius, with all of these milder nights occurring before mid-month. Only 4 nights before mid-month had minimum temperatures below 10 Celsius, but after mid-month there were just 2 nights with lows above 10 Celsius. Although there were 9 nights with minima below 7 Celsius, including the first 2 nights of the month, only 2 nights of these colder nights had lows under 5 Celsius. On the 21st, a minimum of 2.7 Celsius occurred, with 3.8 Celsius recorded on the following night.
Frost
No air frost occurred in this part of Horsholm.
Rain
A total of 50.0 millimetres of rain was measured in September, which was around 10% below the monthly average. Measurable rain fell on 20 days, which was 5 days above the average. The first 6 days of the month were dry, but then measurable rain occurred on each of the following 7 days. Most of the rain was light, but 6.8 millimetres fell on the 8th, followed by 12 millimetres on the 9th. A dry day on the 14th was followed by another week with rain. Once again, much of the rain was light, but 11.4 millimetres fell on the 19th, with 7.0 millimetres measured on the 20th. It was dry between the 22nd and 24th, but rain was recorded on each day during the remainder of the month. However, the highest daily total was only 1.4 millimetres, this occurring on the 27th.
Hail
No hail was observed in this part of Horsholm.
Thunder
There was thunder early in the afternoon on the 16th.
Snow
No sleet or snow was observed in this part of Horsholm.
Wind
It was another unusual month for wind directions with over half the days having breezes emanating from the southeasterly quadrant. Northwesterly winds only accounted for one fifth of the daily totals, and southwesterly winds were even less frequent. The breezes were mostly gentle or moderate in strength, with only one windy day. That day was the 8th when fresh or strong easterly winds blew during the afternoon and early evening.
Fog
No fog was observed in Horsholm during the month.