Winters in Feltham are chilly and unpredictable, with temperatures fluctuating between freezing and mild. January and December typically see the lowest averages around 4-6°C, while February is slightly warmer. As spring approaches, temperatures gradually rise, reaching a pleasant average of 7-11°C by March to May. Summers bring warmth, with June and July experiencing the highest averages above 17°C, but even then, nighttime temperatures can still drop to around 10°C. Autumn sees a return to cooler temperatures, averaging around 8-13°C from October to November.