Those graphs are just "time-series" plots of a single weather parameter (temperature). The fluctuations at different places and times is not strange. The baseline or statistical average of the fluctuations is the important thing. Based on visual inspection (without actual analysis) - these graphs appear to show a trend of higher averages or means (
chemists use time-series analyses, right? 
).
While the term global warming (or cooling) is often used, the real issue is "climate change". Climate is the statistical average of weather patterns over a limited region and minimum time of 30 years (the standard or convention used by climatologists). The parameters under consideration are more than just temperature - rainfall, humidity, wind speed & direction, cloud cover (and to some extent the frequency and intensity of extreme weather events).
So "climate change" or lack thereof cannot be determined from a ten year dataset (which is not being done here, but people often use 1998 as a starting point). Iff detectable trends of a change in weather patterns can be determined using datasets of meteorological parameters over a 30-yr period then climate change (or otherwise) can be said to have taken place.
Another issue is that it amounts to "environmental uncertainty" (in relation to weather / climate). For example, if macro-scale changes cause (as an example) a change in the onset of the monsoon season this affects development and planning, since all schedules for various socio-economic activities will cater for the specific conditions at a predictable time of year. The same is true of places closer to the equator which experience "predictable" wet-season / dry-season, or the peripheral lattitudes that experience the seasonal dynamics of having "predictable" cycles of cold-winters / hot-summer, etc.