Temperature

Monthly Temperature Outlook: June 2023

Issued: 31 May 2023

For June 2023, above-normal temperature is favoured over much of the ASEAN region, with higher probabilities for above-normal temperature predicted over much of the Maritime Continent.

For June 2023, above-normal temperature is predicted over much of the Maritime Continent based on the multi-model ensemble (Figure 4). The models agree with high confidence on above-normal temperature over the eastern half of the Maritime Continent as well as the western Maritime Continent (Figures 1 -3). However, for the southern Maritime continent the NCEP model predicts above-normal temperature (Figure 1), while the ECMWF model predicts near-normal temperature (Figure 2) and the UK Met Office predicts near-to-below normal temperature (Figure 3). Models’ skill for above-normal temperature is relatively good for above-normal temperature over most of the Maritime Continent. 

Models predict above-normal temperature over much of the Mainland Southeast Asia (Figure 4). The probability of above-normal temperature varies across models, with the ECMWF model predicting the highest probability over southern Mainland Southeast Asia (Figure 3), while the NCEP and UK Met Office models predict higher probabilities over parts of northern Mainland Southeast Asia (Figures 1 and 3, respectively). The models’ skill is relatively good for above-normal temperature for most of Mainland Southeast Asia.

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Figure 1: Temperature tercile summary predictions of NCEP model for June 2023 (contains modified Copernicus C3S information).
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Figure 2: Temperature tercile summary predictions of ECMWF model for June 2023 (contains modified Copernicus C3S information).
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Figure 5: Average climatological temperature for June based on ERA5 (Reference period: 1991-2020).

The qualitative outlook is assessed for the region in general. For specific updates on the national scale, the relevant ASEAN National Meteorological and Hydrological Services should be consulted.