Monthly Weather Events - Shannon

Weather events for SHANNON AIRPORT up to 30-Apr-2023

Number of days with Rainfall > 10mm.

Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2023 2 0 4 0 n/a n/a n/a n/a n/a n/a
2022 1 3 1 1 0 2 0 1 5 5 3 4
2021 4 2 2 0 2 0 3 3 2 4 1 3
2020 1 8 1 1 0 2 4 6 0 3 1 4

Number of days with a maximum 10-min. mean wind speed >= 15m/s

Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2023 2 0 3 1 n/a n/a n/a n/a n/a n/a
2022 1 7 1 1 0 0 0 0 0 1 3 0
2021 0 2 3 0 2 0 0 0 0 0 0 4
2020 2 11 5 0 1 1 2 4 0 1 4 2

Number of days with Minimum Temperature < 0 deg. C

Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2023 4 1 1 1 n/a n/a n/a n/a n/a n/a
2022 1 0 6 4 0 0 0 0 0 0 0 10
2021 14 2 1 3 2 0 0 0 0 0 2 0
2020 2 0 3 1 0 0 0 0 0 0 1 5

An objective and measurable approach was adopted in relation to what is considered to be a weather event which could trigger a delay event, i.e. the contractor gets additional time. A delay event is triggered when a weather event exceeds a defined threshold (90th percentile) value in any given month.

Weather events are:

  • Number of days per month with a rainfall amount > 10mm.
  • Number of days per month with a maximum 10-min. mean wind speed >=15m/s.
  • Number of days per month with a minimum temperature < 0 deg. C.